In this article you can get understanding of how to work with variables in Swift 3
You can learn how to define variable and understanding different types of variable
You can define integer variable without specifying the data type
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var x=2 var y=3 var z=x+y print("The result is \(x+y)") |
You can see the following output
The result is 5
Integar Data Type
You can define the integer variable in following way and do the operations
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var a: Int = 4 var b: Int = 1 var c: Int = (a+b) print("The result is \(a+b)") |
Double Data Type
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var a: Double = 4.1 var b: Double = 1.2 var c: Double = (a+b) print("The result is \(a+b)") |
Your output for the above code
The result is 5.3
Float Data Type
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var a: Float = 4.1 var b: Float = 1.2 var c: Float = (a+b) print("The result is \(a+b)") |
Boolean Data Type
You can define the Boolean data type in following way. Boolean data type can have only two values True or False
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var isValid: Bool = true print("Value of isValid: \(isValid)") |
You will have following output for above code
Value of isValid: true
String Data Type
Swift 3 has the String data type to work with string. In this example you can see how to define String variable and contact two string variables
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var hello: String = "Hello" var world: String = "World" var str: String = hello + " " + world print(str) |
In our Playground you can have the following output
Hello World