Int, Float, Double,String etc. var float = -33.861382 var string = "my float is " + float.description or you could let swift do it for you using: var string = "my float is \(float)" Solution 3: In swift 3 it is simple as given below. Type casting is a way to check the type of an instance, or to treat that instance as a different superclass or subclass from somewhere else in its own class hierarchy.. These two operators provide a simple and expressive way to check the type of a value or cast a value to a different type. But that's not the end of the story, you may need to use the NumberFormatter (NSNumberFormatter) class to convert formatted numbers (1,000,000) or currency ($3.50) in your Swift … Float Initialization using Float.init() Swift 4 uses type inference. How to convert a string to a float. Any represents to any data type in Swift e.g. Based on the value you assign to the variable, compiler deduces the datatype. var string = "12.2416" if let floatValue = Float (string) { print ("Float value = \(floatValue) ") } else { print ("String does not contain Float") } If the String contains a valid floating point value, then Swift will assign it to the floatValue constant which will be available within the if let scope. Swift's string interpolation means you can convert all sorts of data – including integers – to a string in just one line of code: let str1 = "\(myInt)" However, the more common way is just to use the string initializer, like this: let str2 = String(myInt) Swift version: 5.2. So they are constants by default. How to convert a string to a float. It means that if you initialize a variable with float value during declaration, you can skip telling the compiler that the variable is of Float type. The result of this example will be printed as “Float value = 12.2416”. Πώς να μετατρέψετε την τιμή float σε String; In Swift 4 you get native String support for working with different numeric types (Float, Double, and Int). This problem occurs when I’m trying to get the value from an UITextField and need this type of conversion! Paul Hudson @twostraws May 28th 2019. Type Casting¶. Θέλω να μετατρέψω -33.861382,151.210316.226.76 σε String. Given a Float or a Double value: var value = 4.53978. Floating point precision in Swift String. Question or problem in the Swift programming language: Please could you help me here? Questions: Below is how I would have previously truncated a float to two decimal places NSLog(@" %.02f %.02f %.02f", r, g, b); I checked the docs and the eBook but haven’t been able to figure it out. Function with in-out parameters. What does that mean? I used to do it like this: […] When you define the function parameter, the function parameters cannot be modified inside the body. How to convert a float to an int; How to convert a String to an Int; How to position views in a grid using LazyVGrid and LazyHGrid; How to make a variadic function; How to use compactMap() to transform an array; About the Swift Knowledge Base. Swift … If you’d like to interpolate a float or a double with a String in Swift, use the %f String format specifier with appropriate number in order to specify floating point precision. Προσπάθησα να το πληκτρολογήσω, αλλά ήταν ανεπιτυχές. Thanks! Type casting in Swift is implemented with the is and as operators. Let's see this in example: I need to understand how to convert a String into an Int, Float or Double! How to convert String to Double or Float in Swift, If the String contains a valid floating point value, then Swift will assign it to the floatValue constant which will be available within the if let scope. 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