Method on a non-struct type in Go (Golang)

Methods can also be defined on a non-struct custom type. Non-struct custom types can be created through type definition. Below is the format for creating a new custom type

type {type_name} {built_in_type}

For example we can a named custom type myFloat of type float64

type myFloat float64

Methods can be defined on the named custom type. See below example:

Code

package main

import (
    "fmt"
    "math"
)

type myFloat float64

func (m myFloat) ceil() float64 {
    return math.Ceil(float64(m))
}

func main() {
    num := myFloat(1.4)
    fmt.Println(num.ceil())
}

Output

2