JavaScript Type Conversion

Type Conversion

Type conversion is the conversion from one data type to another.

Below are the data type conversions:

String Conversion

Conversions from one data type to a string are possible with the String() function in use.

For example, conversion from a boolean to a string:

script.js

const bool = true; // try undefined, null, NaN, etc
console.log(typeof bool); // boolean

const toStr = String(bool);
toStr; // 'true'
console.log(typeof toStr); // string

Number Conversion

Conversions from one data type to a number are possible with the Number() function in use.

For example, conversion from a boolean to a number:

script.js

const bool = true; // try undefined, null, NaN, etc
console.log(typeof bool); // boolean

const toNumber = Number(bool);
toNumber; // 1;
console.log(typeof toNumber); // number

script.js

const notNum = NaN; // try undefined, null, NaN, etc
console.log(typeof notNum); // number

const toNumber = Number(notNum);
toNumber; // NaN;
console.log(typeof toNumber); // number

Boolean Conversion

Conversions from one data type to a boolean are possible with the Boolean() function in use.

For example, conversion from a number to a boolean:

script.js

const num = 0; // try undefined, null, NaN, etc
console.log(typeof num); // number

const toBoolean = Boolean(num);
toBoolean; // false;
console.log(typeof toBoolean); // boolean

Happy Coding!!!

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