01  #include <stdio.h>
02  #include <string.h>
03  
04  int main()
05  {
06   
07   char s[80];
08   int i;
09   printf("Enter the string : ");
10   gets(s);
11   i = strlen(s);
12   printf("The length of the string is %d.", i);
13   
14   return 0;
15   
16  } 

 OUTPUT :
 
 Enter the string : SITS Educators
 
 The length of the string is 14.