go-type-casting

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type-casting

Contents

__Roadmap info from [ roadmap website ] (https://roadmap.sh/golang/go-basics/type-casting) __

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)
}