String length 

This example shows using strlen library function.

File Name  :   source/C/basic/string_length.c  Author  :   Sudhakar KV Email  :   kvenkatasudhakar@gmail.com

view sourceprint? 01 #include<stdio.h> 02 #include<conio.h> 03 #include<string.h> 04   05 int main() 06 { 07     char *s = "BE THE CODER"; 08     printf("\nLength of string (%s) is %d", s, strlen(s)); 09   10     s = "123456"; 11     printf("\nLength of string (%s) is %d", s, strlen(s)); 12       13     s = "123456789"; 14     printf("\nLength of string (%s) is %d", s, strlen(s)); 15       16     getch(); 17     return 0; 18 }

Length of string (BE THE CODER) is 12
Length of string (123456) is 6
Length of string (123456789) is 9