我试图通过此函数将值返回到控制台。但该函数只是在关联的HTML文件的控制台中返回“undefined”。
function calculateFoodOrder(numAnimals, avgFood) {
var animals = Number(numAnimals);
var food = Number(avgFood);
if (isNaN(animals)|| animals<0) {
return null;
}else if(isNaN(food)|| food<0){
return null;
}else{
var total= animals*food;
return total;}}
以下是运行此功能的更好方法:
function calculateFoodOrder(numAnimals, avgFood) {
var total = numAnimals * avgFood;
return isNaN(total) || total < 0 ? false : total;
}
console.log(calculateFoodOrder(1, 10));