Go Data Types and Operators

ExampleGo

package main

import "fmt"

func main() {
  a, b := 17, 5
  fmt.Println(a+b, a-b, a*b, a/b, a%b)
  fmt.Println(float64(a) / float64(b))
  fmt.Println(a > b && b > 0)

  var small int8 = 127
  small++ // wraps around
  fmt.Println(small)

  s := "héllo"
  fmt.Println(len(s), len([]rune(s)))
}

Output

22 12 85 3 2
3.4
true
-128
6 5

Go never converts types behind your back: to divide two ints as decimals you convert them with float64(...). A string's len counts bytes, so the accented letter counts as two.

Quick check

Does Go convert int to float automatically in arithmetic?

YesNo, you convert explicitlyOnly for division

Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.

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