C Program to Print Natural Numbers in reverse

How to write a C Program to Print Natural Numbers in reverse order using For Loop and While Loop?.

C Program to Print Natural Numbers in reverse using For Loop

This program allows the user to enter any integer value. Using For loop, we will print the list of natural Numbers from user-entered value to 1.

/* C Program to Print Natural Numbers in reverse using For Loop */
 
#include<stdio.h>

int main()
{
  	int Number, i;
  
  	printf("\n Please Enter the Maximum Integer Value (Upper Limit)  : ");
  	scanf("%d", &Number);
  	
  	printf("\n List of Natural Numbers from %d to 1 are \n", Number);  	
	for(i = Number; i >= 1; i--)
  	{
    	printf(" %d \t", i);
  	}
  
  	return 0;
}

For loop First Iteration: for(i = 5; 5 >= 1; 5–)
Printf statement will print i = 5

For Loop Second Iteration: for(i = 4; 4 >= 1; 4–)
Printf statement will print i = 4

It will go on until i reaches 0

C Program to return Natural Numbers in reverse using While Loop

This program to Print Natural Numbers in reverse order is the same as above. We just replaced the For Loop with While Loop.

/* C Program to Print Natural Numbers in reverse using While Loop */
 
#include<stdio.h>

int main()
{
  	int Number, i;
  
  	printf("\n Please Enter the Maximum Integer Value (Upper Limit)  : ");
  	scanf("%d", &Number);
  	
  	i = Number;
  	printf("\n List of Natural Numbers from %d to 1 are \n", Number);  	
	
	while(i >= 1)
  	{
    	printf(" %d \t", i);
    	i--;
  	}
  
  	return 0;
}

Please Enter the Maximum Integer Value (Upper Limit)  : 25

 List of Natural Numbers from 25 to 1 are 
 25 	 24 	 23 	 22 	 21 	 20 	 19 	 18 	 17 	 16 	 15 	 14 	 13 	 12 	 11 	 10 	 9 	 8 	 7 	 6 	 5 	 4 	 3 	 2 	 1

C Program to return Natural Numbers in reverse within a Range

Instead of simply printing natural numbers from n to 1, this program allows the user to enter both the Minimum and maximum value. Next, the C Programming compiler will display natural numbers from Maximum value to Minimum.

/* C Program to Print Natural Numbers in Reverse within a Range */
 
#include<stdio.h>

int main()
{
  	int i, Starting_Value, End_Value;
  
  	printf("\n Please Enter the Starting Value (Maximum Integer or Upper Limit) : ");
  	scanf("%d", &Starting_Value);
  	
  	printf("\n Please Enter the End Value (Minimum Integer or Lower Limit)  : ");
  	scanf("%d", &End_Value);  	
  	
  	printf("\n List of Natural Numbers from %d to %d are \n", Starting_Value, End_Value);  	
	for(i = Starting_Value; i >= End_Value; i--)
  	{
    	printf(" %d \t", i);
  	}
  
  	return 0;
}

Please Enter the Starting Value (Maximum Integer or Upper Limit) : 62

 Please Enter the End Value (Minimum Integer or Lower Limit)  : 2

 List of Natural Numbers from 62 to 2 are 
62 	 61 	 60 	 59 	 58 	 57 	 56 	 55 	 54 	 53 	 52 	 51 	 50 	 49 	 48 	 47 	 46 	 45 	 44 	 43 	 42 	 41 	 40 	 39 	 38 	 37 	 36 	 35 	 34 	 33 	 32 	 31 	 30 	 29 	 28 	 27 	 26 	 25 	 24 	 23 	 22 	 21 	 20 	 19 	 18 	 17 	 16 	 15 	 14 	 13 	 12 	 11 	 10 	 9 	 8 	 7 	 6 	 5 	 4 	 3 	 2