I have converted a Python factorial function into a golang program . The Python code is as follows
def main():
n = input('Enter a number')
result = factorial(n)
print(result)
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
And the Golang problem is as follows ,
package main
import "fmt"
func main() {
fmt.Println("Enter a Number ")
var n int64
var result int64
fmt.Scan(&n)
result = factorial(n)
fmt.Println(result)
}
func factorial(n int64) int64 {
//fmt.Println(n)
if n == 0 {
return int64(1)
}
//fmt.Println(n * factorial(n-1))
return int64(n * factorial(n-1))
}
The results of both the programs are same for small numbers.But for bigger numbers The Go output is zero. The Terminal output is as follows ,
enKats-MacBook-Air:Factorials venkat$ python factorial.py
Enter a number5
120
VenKats-MacBook-Air:Factorials venkat$ go run factorial.go
Enter a Number
5
120
VenKats-MacBook-Air:Factorials venkat$ python factorial.py
Enter a number99
933262154439441526816992388562667004907159682643816214685929638952175999932299156089414639761565182862536979208272237582511852109168640000000000000000000000
VenKats-MacBook-Air:Factorials venkat$ go run factorial.go
Enter a Number
99
0
VenKats-MacBook-Air:Factorials venkat$
What's wrong with the Go Program for larger numbers? Any help would be appreciated.