In this program, we will code to calculate the factorial of an integer.
Factorial is a math concept which has a! sign
For example, 3 factorials would be represented as 3! = 3*2*1
0! = 1
Factorial of an Integer
C++:
#include<iostream.h>
#include< conio.h>
#include<stdio.h>
#include<math.h>
void main()
{
clrscr();
int num,fact=1;
cout<<"Enter a number: ";
cin>>num;
for(int i=1; i<=num; i++)
fact *= i;
if(num==0)
cout<<"The factorial is 1";
else
cout<<"The factorial of "<<num<<" is "<<fact;
getch();
}
Output:
Enter a Number: 5 The factorial of 5 is 120
Python:
num =int(input("Enter a Number: "))
fact=1
for i in range(1,num+1):
fact*=i
if num==0:
print("The factorial is 1")
else:
print("The factorial of",num,"is",fact)
Output:
Enter a Number: 6 The factorial of 6 is 720
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