What is the swift code to apply Round Up or Down Sum Amount?

Question

I try on Xcode - Playground.

This is my code. Beginner.

======== import UIKit

var num1 : Double = 0.055  // Stock Price
var num2 : Double = 18     // Lots
var num3 : Double = 1000   // Share Per Lots

var sum1 : Double = num1 * num2 * num3    // Gross Share Price

var sum5 : Double = sum1 * (0.03/100) // Clearing Charges  // Answer Playground Return is " 0.297 "

My Questions is the "sum5" I want answer round up and display " 0.30 "

It is possible in swift code ?

Thanks.

score 1 · Accepted Answer · answered Mar 16 '16 at 06:50

1

You can get it this way:

var roundOfSum5 : Double = Double(round(100 * sum5)/100)  //0.3

answered Mar 16 '16 at 06:50

Dharmesh Kheni

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Thanks a lots for the help in swift. It worked. Thank Dharmesh Kheni. – Jimmy Wong Mar 16 '16 at 07:18
Happy to help you.. :) – Dharmesh Kheni Mar 25 '16 at 05:43

score 0 · Answer 2 · edited May 23 '17 at 10:28

Regarding to that answer

If you need to round to a specific place, then you multply by pow(10.0, numberOfPlaces), round, and then divide by pow(10, numberOfPlaces). In your case the number of places is 2.0:

let numberOfPlaces = 2.0
let multiplier = pow(10.0, numberOfPlaces)
let rounded = round(sum5 * multiplier) / multiplier
print(rounded) // 0.3

If you have a number like sum5 = 0.3465 and you want to round to the third place after the decimal you can use 3.0 for numberOfPlaces and get as result 0.347

What is the swift code to apply Round Up or Down Sum Amount?

2 Answers2