Print Number Using Do While Loop

Explanation

The do while loop is used to execute a block of statements repeatedly until the given condition becomes false. In this program, the loop starts from number 1 and prints numbers up to 10 and vice versa. The statements inside the do block are executed first, and then the condition is checked.

How It Works?

Step 1: Declare an integer variable k and initialize it with 1.
Step 2: The do block starts execution.
Step 3: Display the value of k.
Step 4: Increase the value of k by 1.
Step 5: Check the condition k <= 10.
Step 6: Repeat the loop until the condition becomes false.

Example Program

Print Number 1 To 10



#include <stdio.h>
#include <conio.h>


main()
{


    int k = 1;


    do

    {


        printf("\n %d", k);


        k = k + 1;


    }

    while(k <= 10);


    getch();


}

Output

Print Number 10 To 1



#include <stdio.h>
#include <conio.h>


main()
{


    int k = 10;


    do

    {


        printf("\n %d", k);


        k = k - 1;


    }

    while(k >= 1);


    getch();


}

Output

Practice Exercises

Task 1: Write a C program using the do while loop to print numbers from 1 to 20.

Goal: Learn how to use the do while loop for repeating statements and printing a sequence of numbers.

💡 Hint: Initialize variable k = 1. Print the value of k inside the do block and increase it by 1. Continue the loop while k <= 20.

💡 Show Solution



#include <stdio.h>
#include <conio.h>


main()
{

    int k = 1;


    do

    {

        printf("\n %d", k);

        k = k + 1;

    }

    while(k <= 20);


    getch();


}

Output

Explanation: The program uses a do while loop to print numbers from 1 to 20. The loop executes the statements first and then checks the condition. The value of k increases by 1 after every iteration until it reaches 20.

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