type-casting

Contents

Roadmap info from roadmap website

Type Casting

Go doesn’t support automatic type conversion, but it allows type casting, which is the process of explicitly changing the variable type.

• @official@Tour of Go: Type Casting Basics

• @article@Go Docs: Type Casting

• Basic Type Conversion: Convert between basic types like int and float64 using explicit type conversion. Example: var floatVal float64 = float64(intVal)

• String Conversion: Use functions like strconv.Atoi and strconv.Itoa for converting between strings and integers.

• Type Assertion: Retrieve underlying types from interfaces using type assertions. Example: `strVal, ok := i.(string)

• Custom Type Conversion: Define custom types and methods to handle conversions within your application.

package main

import (
    "fmt"
)

type Celsius float64
type Fahrenheit float64

func (c Celsius) ToFahrenheit() Fahrenheit {
    return Fahrenheit(c*9/5 + 32)
}

func main() {
    tempC := Celsius(25)
    tempF := tempC.ToFahrenheit()
    fmt.Printf("%.2f°C is %.2f°F\n", tempC, tempF)
}