How to find the length of a string using strlen in C

A tutorial for finding the length of a string using strlen in C - language

• The strlen() function counts the number of characters in a given string and returns the long unsigned integer value.
• It is defined in C standard library, within <string.h> header file.

char saying[] = "Better late than never";
strlen(saying);

• It stops counting when the null character is encounter. Because in C, null character is considered as the end of the string.

Working example

#include <string.h>
#include <stdio.h>

int main()
{
    char planet[] = "Earth";

    printf("\n Using strlen for planet without null character: %zu", strlen(planet));
    printf("\n Using sizeof for planet with null character: %zu", sizeof(planet));

    return 0;
}

Output

Using strlen for planet without null character: 5
Using sizeof for planet with null character: 6

Note that the strlen() function doesn't count for the null character \0 whereas sizeof() function does.

Read the complete post on our site Find the length of a string using strlen() in C

Read others post on our site MeshWorld

Happy 😄 coding

With ❤️ from 🇮🇳