Values · Tuck

Go has strings, integers, floats, booleans, and more. Here are a few basic values and the operators that work on them.

package main

import "fmt"

func main() {

Strings can be joined with +.

	fmt.Println("go" + "lang")

Integers and floats.

	fmt.Println("1+1 =", 1+1)
	fmt.Println("7.0/3.0 =", 7.0/3.0)

Integer division truncates; % is the remainder.

	fmt.Println("7/3 =", 7/3, "7%3 =", 7%3)

Booleans, with the usual boolean operators.

	fmt.Println(true && false)
	fmt.Println(true || false)
	fmt.Println(!true)

Integers have explicit widths. A typed number does not convert to another width on its own; a conversion names the type you want.

	var tiny int8 = 100
	fmt.Println("widths:", tiny, int16(tiny), byte('A'))

Bitwise operators act on integers: and, or, xor, and-not, and shifts.

	fmt.Println("bits:", 0b1100&0b1010, 0b1100|0b1010, 0b1100^0b1010, 0b1100&^0b0100, 1<<3, 8>>2)

A complex number holds two floats. real and imag take them back out.

	z := 3 + 4i
	fmt.Println("complex:", real(z), imag(z), complex(1, 2))
}

$ go run ./02_values
golang
1+1 = 2
7.0/3.0 = 2.3333333333333335
7/3 = 2 7%3 = 1
false
true
false
widths: 100 100 65
bits: 8 14 6 8 8 2
complex: 3 4 (1+2i)

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