# C Program to Print Natural Numbers in Reverse Order from 1 to N using For, While and Do-while Loop

• Write a C program to print natural numbers in reverse order from N to 1 using for loop.
• Wap in C to print numbers in reverse order using while and do-while loop

Required Knowledge

### C program to print natural numbers from N to 1 in reverse order using for loop

#include <stdio.h>

int main() {
int counter, N;
/*
* Take a positive number as input form user
*/
printf("Enter a Positive Number\n");
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;
}

Output

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 numbers in reverse order from 10 to 1 using while loop

#include <stdio.h>

int main() {
int counter, N;
/*
* Take a positive number as input form user
*/
printf("Enter a Positive Number\n");
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;
}

Output

Enter a Positive Number
6
Printing Numbers form 6 to 1
6
5
4
3
2
1


### C program to print numbers in reverse from N to 1 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\n");
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;
}

Output

Enter a Positive Number
6
Printing Numbers form 6 to 1
6
5
4
3
2
1