Skip to content

How to find the length of a string in C

A practical tutorial on how to find the length of a string in C

Use the strlen() function provided by the C standard library string.h header file.

char name[7] = "Flavio";
strlen(name);

This function will return the length of a string as an integer value.

Working example:

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

int main(void) {
  char name[7] = "Flavio";
  int length = strlen(name);
  printf("Name length: %u", length);
}
→ Get my C Handbook

I wrote 17 books to help you become a better developer, download them all at $0 cost by joining my newsletter

JOIN MY CODING BOOTCAMP, an amazing cohort course that will be a huge step up in your coding career - covering React, Next.js - next edition February 2025

Bootcamp 2025

Join the waiting list