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
| Data Types | Numeric Conversion |
true and false | 1 and 0 |
string | NaN |
' ', '' | 0, 0 |
null, undefined, and NaN | 0, NaN, NaN |
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
| Data Types | Boolean Conversion |
1 and 0 | true and false |
string and '' | true and false |
' ' | true |
null, undefined, and NaN | false, false, false |
Happy Coding!!!
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