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The strlen() function in C calculates the length of a given string. The strlen() function is defined in string.h header file. It doesn’t count the null character ‘\0’.
// c program to demonstrate
// example of strlen() function.
#include <stdio.h>
#include <string.h>
int main()
{
// defining string
char str[] = "Hello";
// getting length of str using strlen()
int length = strlen(str);
printf("Length of string is : %d", length);
return 0;
}
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