Input 1: 3

Output 1: 6

**Code**

```
# Read the input
n = int(input())
# Factorial function
def factorial(x):
# Handle the edge case of 0. As you know, 0! = 1, you need to specify an explicit
# for this. 1 has also been included in the if statement since 1! also equals 1
if(x==0 or x==1):
return(1)
# If the above statement doesn't satisy, the function will go on so we don't need
# an else statement
# Initialise a variable 'ans' to 1. This will contain the final factorial of the
# given number
ans = 1
# Run a loop from 2 to x
for i in range(2, x+1):
# With each iteration, just multiply 'ans' by i
ans = ans * i
# Return 'ans' from function
return(ans)
# Do not edit this portion (Printing the factorial)
print(factorial(n))
```

## Comments