Data Types and Variables

Math.pow(2.0, 3.0) // 8.0
Math.min(6, 9)     // 6
Math.max(10, 12)   // 12
Math. round(13.7)  // 14

var year = 2019
year++   // 2020
year--   // 2019

var batteryPercentage = 80
// long syntax
batteryPercentage = batteryPercantage + 10
// short syntax with augmented assignment operator
batteryPercentage += 10

5 + 8 *2 /4 -3 // 6
3 + (4 + 4) /2 // 7
4 *2 + 1 *7    // 15
3 + 18 /2 *1   // 12
6 -3 % 2 + 2   // 7

5 + 7  // 12
9 -2   // 7
8 *4   // 32
25 /5  // 5
31 % 2 // 1

+ addition, - subtraction, * multiplication, / division, and % modulus

print("\"Excellent!\" I cried. \"Elementary,\" said he.")
// Print: "Excellent!" I cried. "Elementary," said he.

• \n insert new line
• \t inserts a tab
• \r inserts carriage return
• \' inserts a single quote
• \" inserts a double quote
• \\ inserts a backslash
• \$ inserts a dollar sign

var monument = "the Statue of Liberty"
println(monument. capitalize())
// print: The Statue of Liberty
println(monument. length)
// print: 21

var address = "123 Main St."
println("The address is $address")
// prints: The address is 123 Main St.

var streetAddress = "123 Main St."
var cityState = "Brooklyn, NY"
println(streetAddress + " " + cityState)
// Print: 123 Main St. Brooklyn, NY

// The following variables are assigned a literal value inside double quotes
// so the inferred type is String
var color = "Purple"

val goldenRatio = 1.618

var age = 25
age = 26