Simple Program for Length of String using Pointer in C

About this program

This is an example program in c pointer example programs. Read the concept first: C Pointers, then study the code and output below.

Simple Program for Find or Calculate Length of String Using Pointer

/* Simple Program for Length of String Using Pointer in C*/
/* Print Pointer Address Program,C Pointer Examples */

#include<stdio.h>

int main() {
  char str[20], *pt;
  int i = 0;
  printf("Pointer Example Program : Find or Calculate Length of String \n");
  printf("Enter Any string [below 20 chars] : ");
  gets(str);
  pt = str;
  while (*pt != '\0') {
    i++;
    pt++;
  }
  printf("Length of String : %d", i);

  return 0;
}

Sample Output:

Pointer Example Program : Find or Calculate Length of String
Enter Any string [below 20 chars] : FIND-STRING-LENGTH
Length of String : 18

How It Works

This C program demonstrates Simple Program for Length of String using Pointer. It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Learn the concept first, then study the code:

• C Programs — Browse all C Programs.
• C Pointers — Concept — pointers, addresses and dereferencing.
• Simple Pointer Example Program — More in c pointer example programs.
• Simple Program for Print address of Variable Using Pointer in C — More in c pointer example programs.