In this article, we are going to discuss how to calculate the factorial using loops in C. We recently published an article C program to print bills using structures. So, let’s start creating the program.
Factorial Using Loops In C:
In this section, we are going to discuss the logic of the program. Simply, take the number from the user and declare another variable f(factorial) and initialize it to 1 because we know that a factorial of 1 and 0 is equal to 1.
Next, we use a for loop which iterates from entered number to 1 because we know that factorial is a product of the integer and all the numbers below it. So, we simply multiply f and the loop variable i. This will calculate the factorial of any number you entered.
Program To Calculate Factorial Of A Number Using Loops:
#include<stdio.h>
int main(){
int num, f=1;
printf("Enter Any Number : ");
scanf("%d",&num);
for(int i=num; i>=1; i--){
f=f*i;
}
printf("Factorial of %d = %d",num,f);
}
Output:
Factorial Using While Loop In C:
#include<stdio.h>
int main(){
int num;
int f=1;
printf("Enter Any Number : ");
scanf("%d",&num);
int i =num;
while(i>=1){
f=f*i;
i--;
}
printf("Factorial Of %d is %d ",num,f);
}
Output:
From the above program and discussion, we conclude how to calculate factorial using the loops in c. We hope that you will understand the program easily.
