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Daily Challenge #310 - Boolean to String Conversion

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・1 min read

Implement a function which will convert the given boolean value into its string representation.

So for the boolean false, return "false"
and for the boolean true, return "true"

Good luck!


This challenge comes from btaitelb on CodeWars. Thank you to CodeWars, who has licensed redistribution of this challenge under the 2-Clause BSD License!

Want to propose a challenge idea for a future post? Email yo+challenge@dev.to with your suggestions!

Discussion (12)

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bradtaniguchi profile image
Brad

shortest version I can think of:

javascript

const boolToStr = b => '' + b;
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or a more safe version that wont print null or undefined, rather it will convert it to true/false depending on its "truthiness":

javascript

const boolToStr = b => '' + !!b;
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bugb profile image
bugb • Edited

My solution that is submitted to Codewar

const char *boolean_to_string(bool b)
{
    return b ? "true" : "false";
}
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My another solution that is accepted int and char type.
C using _Generic. feel free to contribute

#define pt() printf("true\n")
#define pf() printf("false\n")
#define cast_to_boolean (x) _Generic( (x), char: x == '\0' ? pf() : pt(), int: x == 0 ? pf() : pt(), default: pf())
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nijeesh4all profile image
Nijeesh Joshy • Edited

Ruby

there already exists a function to_s.

If you want another one, here it is

def bool_to_s(str)
  (!!str).to_s
end
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It will work without the !! I just wanted to make sure it will work even if anything else is passed

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qm3ster profile image
Mihail Malo • Edited

Rust

1. return an owned String:

format!("{}", v);
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or (on nightly)

format!("{v}");
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or

v.to_string();
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2. return a reference to a string embedded in the binary:

fn bas(v: bool) -> &'static str {
    match v {
        true => "true",
        false => "false",
    }
}
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someone in discord golfed that to

["false", "true"][my_bool as usize]
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but idk idk :v

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aminnairi profile image
Amin • Edited

JavaScript

const describeBoolean = boolean => `${boolean}`;
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raphaelchaula profile image
Raphael Chaula

JavaScript

const booleanToString = (value) => {
    return JSON.stringify(value);
};

const booleanValue = true;
const itsStringValue = booleanToString(booleanValue);
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mellen profile image
Matt Ellen

That's pretty heavyweight! value.toString() works, too.

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raphaelchaula profile image
Raphael Chaula

Yes, mine is really really heavy, just tried something no one could think of.

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gargakshit profile image
Akshit Garg
package main

import (
    "fmt"
    "strconv"
)

func main() {
    myBool := true
    fmt.Println(strconv.FormatBool(myBool))
}
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Some go here

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juanbenitezdev profile image
Juan Benitez
boolean_to_string = lambda x: str(x)
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peter279k profile image
peter279k

Python:

def boolean_to_string(b):
    return str(b)
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krusty93 profile image
Andrea Grillo

C#
bool.TrueString.ToLower()
bool.FalseString.ToLower()