JavaScript is dynamically typed, meaning a variable’s data type is determined automatically, but this can sometimes lead to unexpected results. This is where type coercion and conversion come into play.

JavaScript automatically converts types behind the scenes, which can sometimes produce unexpected results.

Example:

JavaScript
console.log(5 + "10");  // Output: "510" (Number is coerced to String)
console.log("5" - 2);   // Output: 3 (String is coerced to Number)

You can explicitly convert one type to another using functions like String(), Number(), or Boolean()..

Example:

JavaScript
let num = "10";
let convertedNum = Number(num);  // Converts string to number
console.log(convertedNum + 5);   // Output: 15