1、非递归
function jieChengFdg(num) { var result = 1; if(num < 0) return -1; if(num == 0 || num == 1) return 1; while(num>1) { result *= num--; } return result; } console.log(jieChengFdg(5));//120
2、递归
function jieChengDg(num) { var result = 1; if(num < 0) return -1; if(num == 0 || num == 1) return 1; if(num > 1) return num*jieChengDg(num-1); } console.log(jieChengDg(10));//3628800
时间: 2024-08-07 17:35:01