Go Programming - Types

Integer

package main

import "fmt"

func main() {
    fmt.Println("1 + 1 =", 1 + 1)
}

If you run the program and you should see this:

$ go run main.go
1 + 1 = 2

In addition to addition Go has several other operators:

+

addition

-	subtraction

*	multiplication

/

division

%

remainder

Strings

package main

import "fmt"

func main() {
    fmt.Println(len("Hello World"))
    fmt.Println("Hello World"[1])
    fmt.Println("Hello " + "World")
}



Running this program should give you:

$ go run main.go 

10

e

Hello World

Booleans

&&

and

||

or

!

not

Here is an example program showing how they can be used:

func main() {
    fmt.Println(true && true)
    fmt.Println(true && false)
    fmt.Println(true || true)
    fmt.Println(true || false)
    fmt.Println(!true)
}

Running this program should give you:

$ go run main.go
true
false
true
true
false



We usually use truth tables to define how these operators work:

Expression

Value

true && true

= true

true && false

= false

false && true

= false

false && false

= false

Expression

Value

true || true

= true

true || false

= true

false || true

= true

false || false

= false

Expression

Value

!true

= false

!false

= true