Formatting decimal places with unknown number

Question

I\'m printing out a number whose value I don\'t know. In most cases the number is whole or has a trailing .5. In some cases the number ends in .25 or .75, and very rarely th

Answer 1

You can use %g to suppress trailing zeros. Then I think you do not need to go through the business of determining the number of places. Eg -

var num1:Double = 5.5
var x = String(format: "%g", num1) // "5.5"

var num2:Double = 5.75
var x = String(format: "%g", num2) // "5.75"

Or this variation where the number of places is specified. Eg -

var num3:Double = 5.123456789
var x = String(format: "%.5g", num3) // "5.1235"