Question

Write a program in C that calculates:

n! = n*(n-1)*(n-2) ...3 ...2 ...1

Use for loop and while loop

Answer 1

CODE IN C:

#include <stdio.h>

int main()
{
int n;
printf("Enter the value of n : ");
scanf("%d",&n);
int fac=1; //initially factorial is taken to be 1
for(int i=1;i<=n;i++)//for loop
{
fac=fac*i;//calculating factorial value
}
printf("The value of fac using for loop is : %d",fac);
printf("\n");
int fac2=1;//initially factorial is taken to be 1
int i=1;
while(i<=n) //while loop
{
fac2=fac2*i;
i++;
}
printf("The value of fac using while loop is : %d",fac2);
}

OUTPUT SNIPPET:

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