Parse a bool or Check if given string is a bool in Go (Golang)

strconv.ParseBool() function can be used to parse a string representation of a bool.

https://golang.org/pkg/strconv/#ParseBool

Below is the signature of the function

func ParseBool(str string) (bool, error)

Let’s see a working code

package main

import (
    "fmt"
    "strconv"
)

func main() {
    input := "true"
    if val, err := strconv.ParseBool(input); err == nil {
        fmt.Printf("%T, %v\n", val, val)
    }

    input = "false"
    if val, err := strconv.ParseBool(input); err == nil {
        fmt.Printf("%T, %v\n", val, val)
    }

    input = "garbage"
    if val, err := strconv.ParseBool(input); err == nil {
        fmt.Printf("%T, %v\n", val, val)
    } else {
        fmt.Println("Given input is not a bool")
    }
}

Output:

bool, true
bool, false
Given input is not a bool

boolean