How to Add Two Numbers in Go

An example program using numbers
Created
Modified

Integers And Floating Point Numbers

Go has several different types to represent numbers. Generally we split numbers into two different kinds: integers and floating-point numbers.

Make a main.go file containing the following:

package main

import "fmt"

func main() {

  fmt.Println("1 + 2 =", 1+2)

  // a floating point number
  fmt.Println("1 + 2 =", 1.0+2.0)

}
$ go run main.go
1 + 2 = 3
1 + 2 = 3

In addition to addition Go has several other operators:

package main

import "fmt"

func main() {

  fmt.Println("5 + 3 =", 5+3)

  // subtraction
  fmt.Println("5 - 3 =", 5-3)

  // multiplication
  fmt.Println("5 * 3 =", 5*3)

  // division
  fmt.Println("5 / 3 =", 5/3)

  // remainder
  fmt.Println("5 % 3 =", 5%3)
}
$ go run main.go
5 + 3 = 8
5 - 3 = 2
5 * 3 = 15
5 / 3 = 1
5 % 3 = 2

Golang max int

To get the maximum value of the int64 type, use math.MaxInt64 constant.

package main

import (
  "fmt"
  "math"
)

func main() {

  fmt.Println("int64 max:", math.MaxInt64)

  // based on the platform you are executing
  maxInt := int(^uint(0) >> 1)
  fmt.Println("int   max:", maxInt)

}
$ go run main.go
int64 max: 9223372036854775807
int   max: 9223372036854775807

Related Tags

#add# #number#

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