C Program to Print Natural Numbers in Reverse From N to 1

In this post, we will learn how to print natural numbers in reverse from N to 1 using C Programming language.

This program asks the user to enter the end value, then it will print the natural numbers in reversed order using the following approaches:

1. Reverse Using Standard Method
2. Reverse numbers In a Range
3. Reverse First 10 Natural Numbers

So, without further ado, let’s begin this tutorial.

C Program to Print Natural Numbers in Reverse From N to 1

 // C Program to Print Natural Numbers in Reverse From N to 1
#include <stdio.h>
int main(){
    int i, num;
    
    // Asking for input
    printf("Enter the last number: ");
    scanf("%d", &num);
    
    printf("Natural numbers in reversed order from %d to 1: \n", num);
    for (i = num; i >= 1; i--){
        printf("%d\n", i);
    }
    return 0;
}

Output

Enter the last number: 15
Natural numbers in reversed order from 15 to 1: 
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

How Does This Program Work ?

    int i, num;

In this program, we have declared two int data type variables named i and num.

    // Asking for input
    printf("Enter the last number: ");
    scanf("%d", &num);

Then, the user is asked to enter the last number.

    printf("Natural numbers in reversed order from %d to 1: \n", num);
    for (i = num; i >= 1; i--){
        printf("%d\n", i);
    }

We used for loop to print the natural numbers in reversed order.

C Program to Print Natural Number in Reverse in Given Range

// C Program to Print Natural Numbers in Reverse in Given Range
#include <stdio.h>
int main(){
    int i, start, last;
    
    // Asking for input
    printf("Enter the starting value: ");
    scanf("%d", &start);
    printf("Enter the ending value: ");
    scanf("%d", &last);
    
    // printf("Reverse natural numbers from %d to %d: \n", start, end);
    for (i = start; i >= last; i--){
        printf("%d\n", i);
    }
    return 0;
}

Output

Enter the starting value: 7
Enter the ending value: 2
7
6
5
4
3
2

C Program to Print First 10 Natural Numbers in Reverse Order

// C Program to Print First 10 Natural Numbers in Reverse
#include <stdio.h>
int main(){
    int i;
    
    printf("The first 10 natural numbers in reverse: \n");
    for (i = 10; i >= 1; i--){
        printf("%d\n", i);
    }
    return 0;
}

Output

The first 10 natural numbers in reverse: 
10
9
8
7
6
5
4
3
2
1

Conclusion

I hope after going through this post, you understand how to print natural numbers in reverse order using C Programming language.

If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to assist you.

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• C Program to Concatenate Two Strings
• C Program to Find Absolute Value of a Number
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• C Program to Find Sum and Average of 3 Numbers