Type Conversion in JS

Type conversion means changing a value from one type to another.

Convert String To Number

let age = window.prompt("how old are you");
age = Number(age);
age += 1;
 
console.log(age, typeof age);

Common Conversions

x = Number(x);
y = String(y);
z = Boolean(z);

Note: "Pizza" convert to number is NaN "Pizza" convert to boolean is "true" "" convert to number is "0" "" convert to boolean is "false"

Related

• JS - Basics
• User’s input in JS