#include <stdio.h>
 
int main() {
    char str[100];
    char *ptr;
    int length = 0;
 
    // Input string
    printf("Enter a string: ");
    fgets(str, sizeof(str), stdin);
 
    // Assign pointer to string
    ptr = str;
 
    // Traverse string until null character
    while (*ptr != '\0') {
        length++;
        ptr++;
    }
 
    // Subtract 1 to ignore newline character (if present)
    if (str[length - 1] == '\n') {
        length--;
    }
 
    // Display result
    printf("Length of the string = %d\n", length);
 
    return 0;
}