My React Journey: Day 2

#javascript #reactnative #mobile

The journey continues, and I’m loving every step! Today, I delved into Basic Operators (Arithmetic, Assignment, Logical, Comparison) and Control Structures (if/else, switch, loops). These concepts are foundational, yet so powerful for building logic in code. Here’s a quick recap of what I learned:

Operators
1. Arithmetic Operators
These are the building blocks for mathematical operations:

+ Addition
- Subtraction
/ Division
* Multiplication
** Exponentiation (used to find powers, e.g., 2 ** 3 = 8)
% Modulus (finds the remainder of a division, e.g., 5 % 2 = 1)

2. Assignment Operators
Used to assign or update values in a variable:

= Assigns a value. Example: a = 5
+=, -=, *=, /=, %= These combine arithmetic and assignment.Example:

let a = 7;
a += 3; // a = a + 3
console.log(a); // Output: 10

**= Raises the variable to a power and assigns the result.

3. Comparison Operators
These compare two values and return a Boolean (true or false):

== Equal to: Compares values but not types.
!= Not equal: True if values are different.
=== Strict equal: Compares both value and type.
!== Strict not equal: Checks that both value and type are different.
>, <, >=, <= Greater than, less than, and their equals variants.

4. Logical Operators
Used to combine or manipulate Boolean values:

&& (Logical AND): Returns true only if all conditions are true.
|| (Logical OR): Returns true if any condition is true.
!(Logical NOT): Flips the Boolean value (!true becomes false).

Control Structures
1. if/else Statements
These are conditional blocks that execute code only when a condition is met. Example:

let age = 18;
if (age >= 18) {
  console.log('You are an adult.');
} else {
  console.log('You are a minor.');
}

2. Switch Statements
A cleaner alternative to multiple if/else blocks, often used for checking one value against multiple cases. Example:

let day = 'Monday';
switch (day) {
  case 'Monday':
    console.log('Start of the work week.');
    break;
  case 'Friday':
    console.log('Almost the weekend!');
    break;
  default:
    console.log('It’s just another day.');
}

3. Loops
Loops are used to execute a block of code repeatedly: