C Program to Print First N Natural Numbers in Reverse

C program to print first n natural numbers in reverse; Through this tutorial, we will learn how to print first n (10, 100, 1000 .. N) natural numbers in reverse in the c program with the help for loop, while loop and do-while loop.

Algorithm and Program to Print First N Natural Numbers in Reverse in C

Let’s use the following algorithm and program to print numbers in reverse order using for loop, while loop and do while loop in c:

• Algorithm to Print First N Natural Numbers in Reverse
• C Program to Print First N Natural Numbers in Reverse using For Loop
• C Program to Print First N Natural Numbers in Reverse using While Loop
• C Program to Print First N Natural Numbers in Reverse using Do While Loop

Algorithm to Print First N Natural Numbers in Reverse

Use the following algorithm to write a program to print first n(10, 100, 1000 .. N) natural numbers in reverse; as follows:

• Step 1: Start Program.
• Step 2: Read the a number from user and store it in a variable.
• Step 3: Print first n natural number in reverse using for loop or while loop or do while loop.
• Step 4: Stop Program.

C Program to Print First N Natural Numbers in Reverse using For Loop

#include <stdio.h>

int main() {
    int counter, N;
    /*
     * Take a positive number as input form user
     */
    printf("Enter a Positive Number :- ");
    scanf("%d", &N);

    printf("Printing Numbers form %d to 1\n", N);
    /*
     * Initialize the value of counter to N and keep on
     * decrementing it's value in every iteration till
     * counter > 0
     */
    for(counter = N; counter > 0; counter--) {
        printf("%d \n", counter);
    }

    return 0;
} 

The output of the above c program; as follows:

Enter a Positive Number :- 10
Printing Numbers form 10 to 1
10
9
8
7
6
5
4
3
2
1 

C Program to Print First N Natural Numbers in Reverse using While Loop

#include <stdio.h>

int main() {
    int counter, N;
    /*
     * Take a positive number as input form user
     */
    printf("Enter a Positive Number :- ");
    scanf("%d", &N);

    printf("Printing Numbers form %d to 1\n", N);
    /*
     * Initialize the value of counter to N and keep on
     * decrementing it's value in every iteration till
     * counter > 0
     */
    counter = N;
    while(counter > 0) {
        printf("%d \n", counter);
        counter--;
    }

    return 0;
} 

The output of the above c program; as follows:

Printing Numbers form 10 to 1
10
9
8
7
6
5
4
3
2
1

C Program to Print First N Natural Numbers in Reverse using Do While Loop

#include <stdio.h>

int main() {
    int counter, N;
    /*
     * Take a positive number as input form user
     */
    printf("Enter a Positive Number :- ");
    scanf("%d", &N);

    printf("Printing Numbers form %d to 1\n", N);
    /*
     * Initialize the value of counter to N and keep on
     * decrementing it's value in every iteration till
     * counter > 0
     */
    counter = N;
    do {
        printf("%d \n", counter);
        counter--;
    } while(counter > 0);

    return 0;
} 

The output of the above c program; as follows:

Enter a Positive Number :- 10
Printing Numbers form 10 to 1
10
9
8
7
6
5
4
3
2
1 

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