28 lines
551 B
C
28 lines
551 B
C
/*
|
|
Factorial of the number: Factorial of a non-negative integer is the multiplication of all positive integers smaller than or equal to n.
|
|
For example factorial of 6 is 6*5*4*3*2*1 which is 720.
|
|
Input | Output
|
|
5 | 120
|
|
6 | 720
|
|
3 | 6
|
|
Time Complexity - O(log(n))
|
|
Space Complexity- O(1)
|
|
|
|
*/
|
|
#include<stdio.h>
|
|
int fact(int n){
|
|
if(n==1){
|
|
return 1;
|
|
}
|
|
else{
|
|
return n*fact(n-1);
|
|
}
|
|
}
|
|
void main(){
|
|
int an;
|
|
printf("Enter a number");
|
|
scanf("%d",&an);
|
|
int f=fact(an);
|
|
printf("factorial of %d is %d",an,f);
|
|
}
|