✳️LESSON 2 : Booleans and Comparison Operators

📝The Boolean object represents a truth value: true or false.
📌Any object, including a Boolean object whose value is false, evaluates to true when passed to a conditional statement.

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✅A comparison operator compares its operands and returns a boolean value based on whether the comparison is true.
⚽️These are >= , <= , = ,!= ...etc
@the operators can categorized as follows

+ Primary expressions
+ Left-hand-side expressions
+ Increment and decrement operations
+ Unary Operators
+ Arithmetic Operators
+ Relational Operators
+ Equality Operators
+ Bitwise Shift Operators
+ Binary bitwise operators
+ Binary bitwise operators
+ Binary logical operators . ..... etc

Eg;_ with different operator types

// === equal
'Andrew' === 'Andrew' // True
'Mike' === 'mike' // False
// !== not equal
'Andrew' !== 32 // True
12 !== 12 // False
// < less than
3 < 40 // True
3 < 3 // False
// <= less than or equal to
// 3 <= 3 // True
// 0 <= -23 // False
// > greater than
16 > -16 // True
-16 > 16 // False
// >= greater than or equal to
-23 >= -40 // True
100 => -100 // False

LESSON 3:IF and Advanced IF statements

⚾️if...else

The if...else statement executes a statement if a specified condition is truthy. If the condition is falsy, another statement in the optional else clause will be executed.

function testNum(a) {
  let result;
  if (a > 0) {
    result = 'positive';
  } else {
    result = 'NOT positive';
  }
  return result;
}

console.log(testNum(-5));
// expected output: "NOT positive"

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1. TheCodePlayer:
link: http://thecodeplayer.com/

» ❤️This a web-based way to sharpen your coding skills by viewing screencasts from other coders. No account or log-in is needed; just visit the site and pick a category to begin watching or streaming a video.

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»‼️If you’ve ever wanted to create a video game from scratch, this is a great way to get some practice in. CheckiO offers game coding practice for coders of all levels, and coders can practice either Python or JavaScript.

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LESSON 4: FUNCTIONS IN JAVASCRIPT

There are three important pieces to create a function:
😡 1. Arguments - they are values passed into a function. if i create a function that validates an email, I'd need to accept the email as a function argument.
💻 2. Function Code- the function code is what goes inside of the curly braces. This is where you define what your function does.
📥3. Return Value - This is a part of the function code. It lets you define what value to send back to the function caller.

🤳🤳🏃🏼🏃🏼
Let's see the snippet using a function #[

fahrenheitToCelsius]#


let fahrenheitToCelsius = function (fahrenheit) {
const celsius = (fahrenheit - 32) * (5 / 9)
return celsius
}
let temp70 = fahrenheitToCelsius(70)
console.log(temp70)
let temp32 = fahrenheitToCelsius(32)
console.log(temp32)

| RUN | | COMPILE |

LESSON 5: null and undefined in JS

🥃The null value represents the intentional absence of any object value.
🎭The global undefined property represents the primitive value undefined. It is one of JavaScript's primitive types.

more on:-
Null - undefined -

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