Int
- whole numbers, will auto use 64-bit if available
Float
- always a 32-bit decimal
- 6 decimal place precision
Double
- 64-bit decimal (default for decimal inference)
- 15 decimal place precision
- swift does not allow overflow (going beyond the range) by default
Declaration
// declaration - create but don't initialize<br>
var myVariable1: Int
// declaration - create/init with 0 value
var myVariable2 = Int()
// create and initialize with an initial value (preferred)
var myVariable3 = 24
// create multiple variables
var yes = 0, no = 0
Notation
// -> 51 prefix with 0b
let binaryNotation = 0b110011
// -> 10 prefix with 0o
let octalNotation = 0o12
// -> 50 prefix with 0x
let hexadecimalNotation = 0x32
// -> suffix with e-
let scientificNotation = 4.4e-7
// optional _ = easier to read
let longNumber = 1_000_000
