将函数的结果推入空数组

Question

I have an array of bills and an empty array for tips. I'm trying to call a tipcalculator function within a for loop so I can calculate the tips of each one of the bills in the bills array, store that result in the empty tips array. Is this possible to be done?
Thanks

 var bills = [123,145,12,44]; var tips = []; function calculateTips(bill){ let tip; if(bill<10){ tip = .2; } if(bill>=10 && bill <20){ tip = .10; } else { tip = 0.1; } return tip * bill; for(var i=0; i<bills.length; i++){ var temp = calculateTips(bills[i]); tips.push(temp); } };

Answer 1

Your loop needs to be outside of the function. As the documentation says :

The return statement ends function execution and specifies a value to be returned to the function caller.

 var bills = [123,145,12,44]; var tips = []; function calculateTips(bill){ let tip; // Since the bill will only fall into one of your tests // use else if, rather than an if followed by another if if(bill < 10){ tip = .2; } else if(bill >= 10 && bill < 20){ tip = .10; } else { tip = 0.1; } // once a function reaches a return statement // it will return the specified value (if any) // and then stop processing the function. return tip * bill; } for(var i=0; i<bills.length; i++){ var temp = calculateTips(bills[i]); tips.push(temp); } console.log(tips);

Answer 2

There is no difference between tip=.10 and tip=0.1 . And you can shorten your script considerably, see below.

 const calculateTips=bill=>((bill>=10?.1:.2)*bill).toFixed(2); var bills = [123,145,12,44,8]; let tips=bills.map(calculateTips); console.log(tips);

Fun fact: Your formula leads to higher tips for 8$ than for 12$ bills.