by Sai gowtham

How to convert a string to Double in Swift

To convert a string to double, we can use the built-in Double() initializer in Swift.

The Double() initializer takes the string as an input and returns the double instance. If the string contains invalid characters or invalid format it returns nil.

Here is an example, that converts the string 13.344 to Double:

let string = "13.344"

let myDouble = Double(string) ?? 0

print(myDouble)

Similarly, we can also use the following syntax to do it.

import Foundation

let string = "13.344"
let myDouble = (string as NSString).doubleValue
print(myDouble)

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