strlen

Find length of string

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Contents

Interface
Description
Return Values
Standards
Page Comments

Interface

#include <string.h>size_t  strlen (const char *s)

Description

The strlen function computes the length of the string s.

Example:

Example - Find length of string

Workings

#include <stdio.h>
#include <string.h>
int main()
{
  char s[20] = "abcde1010101";
  printf("The length of \"%s\" is %d characters.\n", s, strlen(s));
  return 0;
}

Solution

Output:

The length of "abcde1010101" is 12 characters.

Return Values

The strlen function returns the number of characters that precede the terminating NUL character.

Standards

The strlen function conforms to ISO/IEC 9899:1990 ("ISO C90").