const factorial = function(n){
    if(typeof(n) == "bigint") {
        if(n == 1n || n == 0n){
            return 1n
        } else {
            result = 1n
            for(let i=1n; i<= n; i++){
                result = result * i
            }
            return result
        }
    }
    else {
        if(n == 1 || n == 0){
            return 1
        } else {
            result = 1
            for(let i=1; i<= n; i++){
                result = result * i
            }
            return result
        }
    }
    
}


module.exports = { factorial }