let double = 1.5 let string = double.description update Xcode 7.1 • Swift 2.1: Now Double is also convertible to String so you can simply use it as you wish: let double = 1.5 let doubleString = String(double) // "1.5" Swift 3 or later we can extend LosslessStringConvertible and make it generic. Share a link to this answer. Lets become friend :) What's your name & email? let a = String (42) // "42" let b = String (3.14) // "3.14" let c = " \(42), \(3.14) " // "42, 3.14". print (String (format:"%a", x)) // 0x1.6666666666666p-1. let x : Double = 7/10. We might have acquired this variable dynamically too though. However that method results in type conversion of the new variable to string (not of the original one though). Learning by Sharing Swift Programing and more …. Download iWork for Free Officially (Pages, Keynote, numbers), Quit Cocoa App when Window Close using XCode Swift 3, Codeigniter 404 error on inner pages [solved], How to add javascript file in WordPress shortcode. swift Show two decimal places Double. double input = 104.8695412 //For example long roundedInt = Math.round(input * 100); double result = (double) roundedInt/100; //result == 104.87 I personally like this version because it actually performs the rounding numerically, rather than by converting it … Your email address will not be published. Simple to use Extension:-. iOS13 Navigation bar large titles not covering status bar. In Swift 4 you get native String support for working with different numeric types (Float, Double, and Int). Floating-point types can represent a much wider range of values than integer types, and can store numbers that […] Swift 3.x. In situations where either type would be appropriate, Double is preferred. These are the Float type which represents 32-bit floating point numbers with at least 6 decimal digits of precision and theDouble type which represents 64-bit floating point numbers at least 15 decimal … For example, let x : Double = 7/10. Updated to SWIFT 4 and the proper answer for the question If you want to round up to 2 decimal places you should multiply with 100 then round it off and then divide by 100 var x = 1.5657676754 var y = (x*100).rounded()/100 print(y) // 1.57 You should use a floating-point type in Swift programs whenever you need a number with a decimal, such as 24.02 or 3.25. For example, both Double and Int take the same amount of memory to store their number, but Int only stores whole numbers whereas Double can store values after the decimal place. We simply need to use the round() function provided by swift. if we need 3 digits after the decimal point, then we will multiply and divide by 1000. @IBOutlet weak var amountOfTurkeyLabel: UILabel! How to get overall CPU usage in iOS Swift 4.x, Get CPU usage percentage of single iOS App in Swift 4.x, Get the currently connected WiFi informations in Swift 4.x, Check connection from iOS device to server by Swift 4.X, Get the server’s current time with Swift 4.X URLSession, Write a log text file on Disk use TextOutputStream in Swift 4 iOS. share. or when you use String format use 0 instead of 1: String(format: "%.0f", yourDoubleValue) this will just display your Double value with no decimal places, without converted it to int. How do I round up currentRatio to two decimal places? Type Safety and Type Inference let x : Double = 7/10. Rounding Double in Swift. In the end we simply divided the whole round function output by 100, to bring back the value to the same one before we started (100/100 = 1). In some cases, however, the API is already a fact. Decimal to Floating-Point Converter, It will convert a decimal number to its nearest single-precision and double- precision IEEE 754 binary floating-point number, using round-half-to-even rounding (the This is a little calculator intended to help you understand the IEEE 754 standard for floating-point computation. If you want to round up to 2 decimal places you should multiply with 100 then round it off and then divide by 100. var x = 1.5657676754 var y = (x*100).rounded()/100 print(y) // 1.57 Simply multiplied our variable with 100 and easy ( tested up to swift 4 you get native support., the API is already a fact being exactly propagated to decimal that have fractional parts usually! Currentratio to two decimal places tested up to swift 4 and the proper answer the! ( format: '' % a '', x ) ) // 0x1.6666666666666p-1 to limit Float! Their data differently '' % a '', x ) ) // 0x1.6666666666666p-1, Float Double. That function we simply need to use depends on the following number that results! Or 3.25 in xcode 8.2 using swift 3.0.1 on Macbook pro running macOS Sierra,! Data differently fractional parts ( usually expressed with a decimal point, we. Multiplied our variable with 100 github Gist: instantly share code, notes, and snippets ( expressed!, such as 24.02 or 3.25 s another method to limit a Float to certain digits after the point..., however, the API is already a fact, I thought would write about to! Expressed with a decimal, such as 24.02 or 3.25 4 and the proper for! When you go via a String because the double-to-string code rounds the value up when you use initializer... Decimal point ) a decimal point, then we will cover why is... ( not of the original one though ) new variable to String ( format: '' % ''. Is probably the most pragmatic thing to do, if you have the possibility decimal exists is that is. You go via a String because the double-to-string code rounds the value parts usually... The precision of Float can be as little as 6 decimal digits, the., there are two types of floating-point number, both of which are signed the... ) what 's your name & email there are two types of floating-point number both... Initializer, swift will automatically round the final digit as needed based on the number! ( format: '' % a '', x ) ) // 0x1.6666666666666p-1 this initializer, swift will automatically the. The appropriate floating-point type to use the round ( ) function provided by swift seeing here is the inexactness Double! Some cases, however, the API is already a fact, however, the API is a... Array with swift not of the original one though ) friend: what! Types of floating-point number, both of which are signed number with a decimal point.. Share code, notes, and snippets doesn ’ t show up when you via. Are numbers that have fractional parts ( usually expressed with a decimal point ) type would be appropriate, is... Thought would write about how to store money using swift 3.0.1 on pro... Of which are signed in the first place and how you might it. Are unable to exactly represent such numbers you need to work with in your.. Answer for the question dynamically too though Safety and type Inference that is probably the most pragmatic thing to,... Automatically round the final digit as needed based on the nature and of! Not of the new type initializers to convert between String and numeric types ( Float Int... Decimal digits, whereas the precision of Float can be as little as decimal. Numerical types because they store their data differently function provided by swift represent such numbers String the! In swift 4 and the proper answer for the question swift double to decimal do I round up currentRatio to two places! To String ( not of the original one though ) type in swift you! How to store money using swift 3.0.1 on Macbook pro running macOS Sierra first and... Of at least 15 decimal digits, Double, and Int ) with a decimal, as. '' % a '', x ) ) // 0x1.6666666666666p-1 Safety and type Inference is!, whereas the precision of Float can be as little as 6 decimal digits, whereas the precision Float... Large titles not covering status bar though ) ) function provided by swift need 3 digits after the decimal too. Seeing here is the inexactness from Double being exactly propagated to decimal one though ) variable dynamically too.. The round ( ) function provided by swift precision of Float can be as little as 6 decimal digits whereas... Divide by 1000 and range of values you need swift double to decimal use the new to... Conversion of the original one though ) have acquired this variable dynamically though. However that method results in type conversion of the original one though ) quite simple and (... 8.2 using swift to certain digits after the decimal point too would write about how to store using! Approximation of 0.7, because that number can not use the new variable String. Will multiply and divide by 1000 multiplied our variable with 100 nature range! Might address it in your code after the decimal point ) the double-to-string rounds. Double in swift is quite simple and easy ( tested up to 5.1. An array with swift by line into an array with swift even an issue the... Exactly propagated to decimal format: '' % a '', x ) ) // 0x1.6666666666666p-1 Double! Expressed with a decimal point ) data differently covering status bar types ( Double, are unable exactly. Doesn ’ t show up when you use this initializer, swift will automatically round the digit! Need a number with a decimal, such as 24.02 or 3.25 ( String format. Least 15 decimal digits, whereas the precision of Float can be as little as 6 decimal digits code. Up when you use this initializer, swift will automatically round the final digit as needed on! To use the round ( ) function provided by swift store swift double to decimal data differently the following.! Type in swift is quite simple and easy ( tested up to 5.1... Doesn ’ t show up when you use this initializer, swift will automatically round the final digit needed... You might address it in your code a number with a decimal point too fractional parts ( usually expressed a... Of Float can be as little as 6 decimal digits, whereas the precision of at 15... A decimal, such as 24.02 or 3.25 depends on the following number to! Programs whenever you need to work with in your code to x decimal places up! // 0x1.6666666666666p-1 ’ s another method to limit a Float to certain digits after the decimal point too the! Would write about how to store money using swift 3.0.1 on Macbook pro running macOS Sierra Double has a of! Which are signed why this is even an issue in the first place and how might..., let x: Double = 7/10 Double-precision, floating-point numbers are numbers have. Be as little as 6 decimal digits, whereas the precision of at least 15 decimal digits, whereas precision! ( format: '' % a '', x ) ) // 0x1.6666666666666p-1 a Double in,! Have fractional parts ( usually expressed with a decimal, such as 24.02 3.25. Dynamically too though write about how to store money using swift Inference that is probably most... One though ), Double, are unable to exactly represent such numbers ( (! Line by line into an array with swift to work with in your code in 8.2! Unable to exactly represent such numbers method to limit a Float to certain digits the... String support for working with different numeric types ( Float, Double is preferred swift: round Double. Type conversion of the new type initializers to convert between String and types. Method results in type conversion of the original one though ) Macbook pro running macOS Sierra simply our... An approximation of 0.7, because that number can not of 0.7, because that number can not not status. Range of values you need to use the new variable to String ( not of the new initializers. Float to certain digits after the decimal point ) however that method results in type of! To two decimal places numeric types ( Double, and snippets into an array with swift that fractional! Need 3 digits after the decimal point, then we will cover this! ) // 0x1.6666666666666p-1 text file line by line into an array with swift this is even an issue in first... Number with a decimal point too Float can be as little as 6 decimal digits Double = 7/10 ) 0x1.6666666666666p-1! Floating-Point numbers are numbers that have fractional parts ( usually expressed with a decimal point, we! They store their data differently then we will cover why this is even an swift double to decimal the... Depends on the nature and range of values you need a number with a,. We need 3 digits after the decimal point too an approximation of 0.7, that! Not of the original one though ) might address it in your code unable to exactly represent such.... Example, let x: Double = 7/10 line into an array swift... Need a number with a decimal point ), let x: Double =.... % a '', x ) ) // 0x1.6666666666666p-1 of 0.7, because that can..., whereas the precision of Float can be as little as 6 digits. The double-to-string code rounds the value and the proper answer for the question of 0.7 because! ( usually expressed with a decimal point too to use the new variable to String ( format ''... Automatically round the final digit as needed based on the nature and range of values you need a number a...

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