strlen() function in c
The strlen() function calculates the length of a given string.The strlen() function is defined in string.h header file. It doesn’t count null character ‘\0’.
Syntax:
int strlen(const char *str);
Parameter:
- str: It represents the string variable whose length we have to find.
Return: This function returns the length of string passed.
Below programs illustrate the strlen() function in C:
Example 1:-
// c program to demonstrate// example of strlen() function. #include<stdio.h>#include <string.h> int main(){ char ch[]={'g', 'e', 'e', 'k', 's', '\0'}; printf("Length of string is: %d", strlen(ch)); return 0;} |
Output :
Length of string is: 5
Example 2:-
// c program to demonstrate// example of strlen() function. #include<stdio.h>#include <string.h> int main(){ char str[]= "geeks"; printf("Length of string is: %d", strlen(str)); return 0;} |
Output:
Length of string is: 5
Example 3:-
// c program to demonstrate// example of strlen() function.#include<stdio.h>#include <string.h> int main(){ char *str = "geeks"; printf("Length of string is: %d", strlen(str)); return 0;} |
Output :
Length of string is: 5
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