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iOS Swift Basics (retired) Operators Binary Operators

simon crum
simon crum
885 Points
Posted by simon crum
simon crum
885 Points

can't I use parenthesis? let areaInFeet = ((height * width)/12)

This was supposed to change inches into feet for an area. Why is it incorrect?

area.swift 
// the height and width of a wall
let height = 120.0 // in inches
let width = 144.0 // in inches
let areaInFeet = ((height * width)/12)

1 Answer

James Pamplona
James Pamplona
10,015 Points
James Pamplona
James Pamplona
10,015 Points

Parentheses are fine, it's the calculation that is off.

To get the area in feet, you have to divide each component by 12 to get the feet and then multiply them together. 

let areaInFeet = ((height / 12) * (width / 12))
simon crum
simon crum
885 Points
simon crum
simon crum
885 Points

Ah, math. Ok. Thanks.