Format
#include <string.h>
size_t strlen(const char *string);Language Level: ANSI
Threadsafe: Yes.
Description
The strlen() function determines the length of string excluding the ending null character.
Return Value
The strlen() function returns the length of string.
Example that uses strlen()
This example determines the length of the string that is passed to main().
#include <stdio.h>
#include <string.h>
int main(int argc, char ** argv)
{
if ( argc != 2 )
printf( "Usage: %s string\n", argv[0] );
else
printf( "Input string has a length of %i\n", strlen( argv[1] ));
}
/****************** If the input is the string ***********************
*****************"How long is this string?", ******************
****************** then the expected output is: *****************
Input string has a length of 24
*/Related Information