Question

How to find factorial of a number in Go

Answer 1

package main

import "fmt"

func factorial(n int) uint64 { 
    var fact uint64 = 1 

    if (n < 0) {
        fmt.Print("No factorial of negative number")    
    } else {        
        for i := 1; i <= n; i++ {
            fact *= uint64(i) 
        }
    }    
    return fact  
}
 
func main(){    
    n  := 4
    fmt.Println(factorial(n))
 
    fmt.Println(factorial(7))   
}
 
 
 
 
/*
run:
 
24
5040

*/

 

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