explicit-and-implicit-conversion-in-javascript.js

/*

Part 1: Debugging Challenge
The JavaScript code below contains intentional bugs related to type conversion.
Please do the following:
  - Run the script to observe unexpected outputs.
  - Debug and fix the errors using explicit type conversion methods like  Number() ,  String() , or    Boolean()  where necessary.
  - Annotate the code with comments explaining why the fix works.

Part 2: Write Your Own Examples
Write their own code that demonstrates:
  - One example of implicit type conversion.
  - One example of explicit type conversion.

  *We encourage you to:
Include at least one edge case, like NaN, undefined, or null .
Use console.log() to clearly show the before-and-after type conversions.

*/

// Implicit type conversion works here because "-" forces string to number
let result = "5" - 2;
console.log("The result is: " + result); //output:3

// Boolean conversion: non-empty strings are always true, 
// but "false" as a string is still truthy, so this is a bit misleading

let isValid = Boolean("false");
if (isValid) {
    console.log("This is valid!"); // Will always print
}

// Fix: Convert age to a number before adding

let age = "25";
let totalAge = age + 5; //age is a string, so (+) operator will concatenate instead of add
console.log("Total Age: " + totalAge); // 255

// Convert string to number before adding
let fixedTotalAge = Number(age) + 5;
console.log("Fixed Total Age:", fixedTotalAge); // 30 
// Explanation: Number(age) converts "25" to 25, so math(+) operator works correctly

 // Task 2 Implicit Type conversion Example
// Explanation: JavaScript automatically converts "10" to number

let implicitExample = "10" * 2;
console.log("Implicit Result:", implicitExample); // 20
console.log("Type:", typeof implicitExample); // number

// Explicit Type Conversion Example (edge case)
let value = null;
let convertedValue = Number(value);

console.log("Before:", value); // null
console.log("After:", convertedValue); // 0
console.log("Type:", typeof convertedValue); // number
// Explanation: null is explicitly converted to 0