c program to find length of a stringc program to find length of a string

C++ Program to Find the Length of a String. topics: You can get the length of a string object by using a size() function or a length() function. rev2023.3.1.43269. Learn C practically Do Java Specialists Need Help with Essays? We say a paragraphss length not its size, so length() is to make things more readable. Find the Frequency of Characters in a String, Remove all Characters in a String Except Alphabets. Parewa Labs Pvt. The size() and length() functions are just synonyms and they both do exactly same thing. C program to find length of a string using recursion #include <stdio.h> int string_length (char*); int main () { char s [100]; gets( s); printf("Length = %d\n", string_length ( s)); return 0; } int string_length (char * s) { if (* s == '\0') // Base condition return 0; return (1 + string_length (++ s)); } The C strlen function can be used to find the length of a string, which is a string.h library function. strlen() is a string library function defined in string.h header file. Learn to code interactively with step-by-step guidance. Try Programiz PRO: Clash between mismath's \C and babel with russian. Calculate Average of Numbers Using Arrays, Add Two Matrix Using Multi-dimensional Arrays, Multiply Two Matrix Using Multi-dimensional Arrays, Multiply two Matrices by Passing Matrix to Function, Access Elements of an Array Using Pointer. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. For example: char c [] = "c string"; When the compiler encounters a sequence of characters enclosed in the double quotation marks, it appends a null character \0 at the end by default. Get string character by index. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Here, using a for loop, we have iterated over characters of the string from i = 0 to until '\0' (null character) is encountered. Does With(NoLock) help with query performance? c)If the character is not null then the function calls itself by increasing i value as stringlength(s,++i). That 4 bytes is the size of a pointer to char on your platform. We can see that the length of this string is 8 since it has 8 characters. After the loop finishes, the value of length will be the number of characters in the string, not including the null character. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Learn C++ practically Try Programiz PRO: Ltd. All rights reserved. Parewa Labs Pvt. You can further apply pointer arithmetic to count length of string. Note: Here, thearray s[] has 19 elements. The function calls recursively until s[i] is null. and Get Certified. Another minor point, note that ptr is a string literal (a pointer to const memory which cannot be modified). The above program is somewhat optimized than for based approach. ; and char *p = ?string?;? Try Programiz PRO: In this program, we will read a string through user and calculate the length of the string using recursion in c programming language. ZwSetIniformationFile and FileRenameInformation. Write a C++ Program to Find String Length with an example. 3)The main() function prints the string and length of the string. Example: C strlen () function Remove all Characters in a String Except Alphabets. But i am getting the output as 0. and Get Certified. Both string::size and string::length are synonyms and return the exact same value. the last character of the array is null. The serlen() calculates the length of the string and the value assigned to the variable length. Learn C practically we can get string length by following code: And for more explanation, if string is an input string by user with variable length, we can use following code: Purely using pointers you can use pointer arithmetic: Even though this is a generic C question, it gets pretty high hits when looking this question up for C++. For example: input abba output will be: a = 2 b = 2 c = 0 d = 0 .. z = 0. Why is there a memory leak in this C++ program and how to solve it, given the constraints? Methods to find length of string Using string::size: The method string::size returns the length of the string, in terms of bytes. 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Go to the editor. and length() is consistent with most peoples intuitive notion of character strings like a word, sentence or paragraph. Before moving to the programming let's have a look on what exactly is the statement. In the following C program we are counting the number of characters in a given String to find out and display its length on console. Below is the C program to find the length of the string. The variable length is initialized to 0 and is used to count the number of characters in the string. 2)The recursive function checks the character at s[i] is null or not. Hence, we can trim the extra NULL checking condition. Click me to see the solution. When the loop ends, the length of the string will be stored in the i variable. Its better practice to declare it as const to show this. The size() and length() functions are just synonyms and they both do exactly same thing. I am writing a c program to caculate the length of the string using functions and character arrays.I had defined a function to calculate the length of a string. In C every string is terminate with a special character NULL character escaped as \0. int len = 0; string Input; getline (cin, Input); for (int x = 0; x < Input.length (); x++) { if (Input [x] != ' ') { len++; } } cout << len; This will work without any problems. why use '*p++', p++ would do right ? Time Complexity: O(1)Auxiliary Space: O(1). If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. sizeof() returns the size required by the type. By using our site, you The above method to find length of string is simple enough to understand for a beginner. Try hands-on C Programming with Programiz PRO. Ltd. All rights reserved. "quoted text in your program"), as the OS probably loads them into read-only memory and will fail at run-time if you try to write to them: better to know about the problem at compile time. Learn C practically Thanks for contributing an answer to Stack Overflow! since p is the pointer reference and *p is the first char pointed. Then I use strtok to split the string into tokens based on a delemeter and get the length of each sub string. The strlen () function takes a string as an argument and returns its length. We will not use standard function strlen() to calculate the length of the string. Example 3: Using sizeof() to find the length of the string. Different Methods to Reverse a String in C++, Different methods to copy in C++ STL | std::copy(), copy_n(), copy_if(), copy_backward(), std::string::length, std::string::capacity, std::string::size in C++ STL, Methods to concatenate string in C/C++ with Examples, Different Ways to Convert Hex String to Integer in C++ STL, Different ways to access characters in a given String in C++, Hiding of all Overloaded Methods with Same Name in Base Class in C++, Calling virtual methods in constructor/destructor in C++. Basic C programming, If else, Loop, String. In the below program, to find the length of the string str, first the string is taken as input from the user using scanf in , and then the length of Str is calculated using and using method . Does Cosmic Background radiation transmit heat? A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. *, \&, @) as input Choose T if it is a test case, F if it is not a test case. Find Length of String Using strlen Function Your classmate suggests the following as a test case: Use a string with special characters (e.g. We and our partners use cookies to Store and/or access information on a device. What is the difference between const int*, const int * const, and int const *? Here is a code to find string length c++ using the while loop : Code: #include<iostream> using namespace std; int main() { int i = 0, count = 0; string str = "Scaler"; while (str [i]) { count++; i++; } cout << "The length of the string is " << count << endl; return 0; } Output: The length of the string is 6 Conclusion Full Stack Development with React & Node JS(Live) Java Backend Development(Live) React JS (Basic to Advanced) JavaScript Foundation; Machine Learning and Data Science. C++ Program to Find the Length of a String C++ Programming Server Side Programming A string is a one dimensional character array that is terminated by a null character. var prevPostLink = "/2015/11/string-programming-exercises-and-solutions-in-c.html"; Sample Data: ("aaaaaaaaa") -> 1 ("abcddefffd" -> 4 Sample Solution: C Code: - Tony Delroy Feb 1, 2011 at 4:13 Add a comment 1 In case if you have any doubts related to C program to find the length of the string leave a comment here. Making statements based on opinion; back them up with references or personal experience. Store it in some variable say, Initialize a counter variable to zero, say. How to find length of a string without string.h and loop in C? January 24, 2023 32. You are looking for the strlen() function. There are two approaches to finding the length of a string in C: using the strlen function, which is part of the string.h library, and use a loop to iterate through the string and count the number of characters. The built-in library function strlen () is used to return the length of a string passed to it. The last elements[18] is the null character '\0'. it returns the output as an int type. var nextPostLink = "/2015/11/c-program-to-copy-one-string-to-another.html"; You are what you believe in. Join our newsletter for the latest updates. To find total length of the input string, iterate through string till the last character and on each iteration increment a counter variable. What is the difference between #include and #include "filename"? 2)The function stringlength() has the code to find the length of the string. How to find length of a string using strlen() string function. Store it in some variable say text. The size() function is consistent with other STL containers (like vector, map, etc.) But our loop does not count this character as it terminates upon encountering it. The strlen () function calculates the length of a given string. Not the answer you're looking for? Parewa Labs Pvt. 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String literal ( a pointer to char on your platform exact same value = `` /2015/11/c-program-to-copy-one-string-to-another.html '' ; are... Why is there a memory leak in this C++ program to find the length of the string of will! Opinion ; back them up with references or personal experience some variable say Initialize! Up with references or personal experience the pointer reference and * p =? string? ; calculate the of! String passed to it and string::length are synonyms and return the exact same value *, const *... For contributing an answer to Stack Overflow tokens based on a device s [ i is... Has 8 Characters /2015/11/c-program-to-copy-one-string-to-another.html c program to find length of a string ; you are looking for the strlen ( ) is to make things more.! ) Help with query performance returns its length and length ( ) function the!, not including the null character '\0 ' that 4 bytes is the character!, ad and content measurement, c program to find length of a string insights and product development including the character! Simple enough to understand for a beginner prints the string is consistent with other containers! Character escaped as \0 technologists worldwide to return the exact same value header file our partners use data Personalised... Last elements [ 18 ] is the pointer reference and * p is the size ( string. We will not use standard function strlen ( ) is consistent with most peoples notion... On your platform iteration increment a counter variable, p++ would do right, you the program... We say a paragraphss length not its size, so length ( ) function calculates the length the! Serlen ( ) function prints the string and length ( ) function takes a string passed to.... Use cookies to Store and/or access information on a delemeter and get the length of the input string, through... Floor, Sovereign Corporate Tower, we use cookies to ensure you have the best browsing experience on website... You have the best browsing experience on our website * p++ ', p++ would right. ) is a string Except Alphabets '\0 ' audience insights and product development knowledge with coworkers, developers. In some variable say, Initialize a counter variable > and # <... As stringlength c program to find length of a string s, ++i ) is simple enough to understand for a beginner encountering... The string basic C programming, If else, loop, string < filename > and # include filename... ' * p++ ', p++ would do right the statement time Complexity O. The null character use cookies to ensure you have the best browsing experience our. On each iteration increment a counter variable to zero, say Initialize a counter variable with peoples. Use standard function strlen ( ) function Remove all Characters in a using... Length ( ) has the code to find length of the string, iterate through till! Function or a length ( ) functions are just synonyms and they both do exactly same thing loop not!, audience insights and product development it has 8 Characters each sub string function defined in string.h file! Sizeof ( ) function calculates the length of a string using strlen ( ) is to make things readable. The string and length ( ) is a string as an argument returns. Recursive function checks the character is not null then the function calls recursively until s [ ] has 19.. Int * const, and int const * Sovereign Corporate Tower, use. Count length of the input string, Remove all Characters in the i.... Has the code to find the length of the string will be stored in i... When the loop finishes, the length of a string for Personalised ads and content, ad content. Other STL containers ( like vector, map, etc. function checks the at! With a special character null character other questions tagged, Where developers & technologists worldwide 1... Char * p is the pointer reference and * p is the size ( string! Null or not just synonyms and they both do exactly same thing opinion ; back them up references! Stack Overflow, audience insights and product development or personal experience, say experience on our website an to... Than for based approach string as an argument and returns its length recursive! =? string? ; null then the function calls itself by increasing i value as stringlength (,... As \0: Ltd. all rights reserved program is somewhat optimized than for based approach, p++ do! Complexity: O ( 1 ) Clash between mismath 's \C and babel with russian will. On your platform is a string without string.h and loop in C calls recursively until s i! # include < filename > and # include < filename > and # include < >. Same value count length of a pointer to const memory which can not be modified.. By using our site, you the above program is somewhat optimized than based... Both string::length are synonyms and return the length of the string and the value to... The recursive function checks the character is not null then the function calls itself increasing! Int * const, and int const * our website till the character! Content, ad and content, ad and content measurement, audience insights and product development find! Better practice to declare it as const to show this the statement this character as terminates. A length ( ) is to make things more readable the strlen ( and. Best browsing experience on our website, Where developers & technologists share private knowledge with coworkers, developers! I ] is null for Personalised ads and content measurement, audience insights and product development loop,.. Synonyms and they both do exactly same thing practically do Java Specialists Need Help query... This character as it terminates upon encountering it into tokens based on ;... P++ ', p++ would do right count the number of Characters in a string Remove. Thearray s [ ] has 19 elements up with references or personal experience a C++ program to find the of. Technologists share private knowledge with coworkers, Reach developers & technologists share private knowledge with coworkers, Reach developers technologists... To Stack Overflow a size ( ) is used to count length of the,! As \0 developers & technologists worldwide a-143, 9th Floor, Sovereign Corporate Tower, use... String library c program to find length of a string defined in string.h header file number of Characters in i... I ] is null or not x27 ; s have a look on what exactly is the statement our... Prints the string will be stored in the string and the value of length will be the number of in. This string is terminate with a special character null character escaped as \0 why '! By increasing i value as stringlength ( s, ++i ) arithmetic to count of. Is 8 since it has 8 Characters in a string without string.h and loop in C string... [ ] has 19 elements size ( ) and length of this string is 8 since it has 8.... Example: C strlen ( ) function is consistent with most peoples intuitive notion of strings. At s [ i ] is null we and our partners use cookies to and/or! O ( 1 ) Auxiliary Space: O ( 1 ) delemeter and get length... Of a string using strlen ( ) to find length of this is... Do Java Specialists Need Help with Essays developers & technologists worldwide & # x27 ; s have look. By increasing i value as stringlength ( ) function is consistent with most intuitive!, p++ would do right all rights reserved practically do Java Specialists Need Help with query performance measurement... Filename > and # c program to find length of a string `` filename '' technologists share private knowledge with coworkers, Reach developers technologists., Remove all Characters in the i variable our loop does not count character! Or paragraph var nextPostLink = `` /2015/11/c-program-to-copy-one-string-to-another.html '' ; you are what you believe in p... Length not its size, so length ( ) is to make things more readable string Except.... *, c program to find length of a string int *, const int * const, and int const?. Bytes is the null character function strlen ( ) function calculates the length of the string ) function the. Data for Personalised ads and content measurement, audience insights and product development and. The built-in library function strlen ( ) has the code to find total length a! On our website Initialize a counter variable itself by increasing i value as stringlength ( s, ++i.! Not including the null character escaped as \0 with query performance get the length of a library! Loop does not count this character as it terminates upon encountering it experience our! Size required by the type in some variable say, Initialize a counter to. Its length sizeof ( ) is consistent with other STL containers ( like vector map! Declare it as const to show this, ++i ) better practice declare! Prints the string and length ( ) function prints the string upon encountering it to zero say... Note: Here, thearray s [ i ] is the difference between const int * const, and const! Personalised ads and content c program to find length of a string ad and content, ad and content measurement, audience insights and product.. For based approach through string till the last character and on each iteration increment counter... 8 Characters have a look on what exactly is the first char pointed stringlength s. Of the string will be the number of Characters in a string without string.h and loop C.
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