Working with Swift. I am converting value from String to double.

let value: String = "8"    
var size: Double   
size = Double(value) 
size = 8.0 // 8.0

Result should be 8 unless string value is 8.0

CodePudding user response：

Double only stores a numeric magnitude. "8" and "8.0" have the same magnitude, so they get represented by the same Double value. Whether you show trailing 0s or not is a consequence of how you choose to format and present your values.

print does it one way for debugging, but NumberFormatter gives you more control to format numbers for real, non-debugging purposes.