JavaScript Operators

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🎯 Assignment Operator (=)

• The operator = is used to assign values to variables.

• Example:

  let y = 5;
  let z = 2;
  let x = y + z; // x will be 7
  

✖️ JavaScript Arithmetic Operators

Arithmetic operators are used to perform mathematical calculations between variables and values.

Examples: Given y = 5, the table below explains arithmetic operators.

📦 Arithmetic Operators Table 📦

| Operator | Description        | Example    | Result  |
|----------|--------------------|------------|---------|
| `+`      | Addition           | x = y + 2  | x = 7   |
| `-`      | Subtraction        | x = y - 2  | x = 3   |
| `*`      | Multiplication     | x = y * 2  | x = 10  |
| `/`      | Division           | x = y / 2  | x = 2.5 |
| `%`      | Modulus (Remainder)| x = y % 2  | x = 1   |
| `++`     | Increment          | x = ++y    | x = 6   |
| `--`     | Decrement          | x = --y    | x = 4   |

🎛️ **JavaScript Assignment Operators**

Assignment operators are used to assign values to JavaScript variables.

Examples:
Given x = 10 and y = 5,
 the table below explains assignment operators.


📦 Assignment Operators Table 📦

| Operator | Example  | Same As     | Result  |
|----------|---------|-------------|---------|
| `=`      | x = y   | x = y       | x = 5   |
| `+=`     | x += y  | x = x + y   | x = 15  |
| `-=`     | x -= y  | x = x - y   | x = 5   |
| `*=`     | x *= y  | x = x * y   | x = 50  |
| `/=`     | x /= y  | x = x / y   | x = 2   |
| `%=`     | x %= y  | x = x % y   | x = 0   |

✏️ **Using the + Operator with Strings**

The + operator can also be used to concatenate strings.

Example 1: javascript let txt1 = "What a very"; let txt2 = "nice day"; let txt3 = txt1 + txt2;

console.log(txt3); // Output: "What a verynice day"

Adding Space Between Strings:

javascript let txt1 = "What a very "; let txt2 = "nice day"; let txt3 = txt1 + txt2; console.log(txt3); // Output: "What a very nice day" Insert Space Directly in the Expression:

javascript let txt3 = txt1 + " " + txt2;

console.log(txt3); // Output: "What a very nice day"

🔢 Adding Strings and Numbers

If a number and a string are added together, the result will be a string.

Examples: javascript let x = 5 + 5; console.log(x); // Output: 10

let y = "5" + "5"; console.log(y); // Output: "55"

let z = 5 + "5"; console.log(z); // Output: "55"

let w = "5" + 5; console.log(w); // Output: "55"

Rule:
📌 If a number and a string are added together, the result will always be a string.

🛠️ **JavaScript Comparison and Logical Operators**

Comparison Operators:

Used in logical statements to compare values.

Given x = 5, the table below explains comparison operators:

📦 Comparison Operators Table 📦

| Operator | Description                          | Example       | Result  |
|----------|--------------------------------------|--------------|---------|
| `==`     | Equal to                            | x == 8       | false   |
| `===`    | Strictly equal (value & type)      | x === 5      | true    |
|          |                                     | x === "5"    | false   |
| `!=`     | Not equal to                        | x != 8       | true    |
| `>`      | Greater than                        | x > 8        | false   |
| `<`      | Less than                           | x < 8        | true    |
| `>=`     | Greater than or equal to           | x >= 8       | false   |
| `<=`     | Less than or equal to              | x <= 8       | true    |


Usage Example:
javascript
if (age < 18) {

    console.log("Too young");
}

**Logical Operators:**

Logical operators determine the logic between variables or values.

Given x = 6 and y = 3, the table below explains logical operators:



📦 Logical Operators Table 📦

| Operator | Description  | Example                 | Result  |
|----------|-------------|-------------------------|---------|
| `&&`     | AND         | (x < 10 && y > 1)       | true    |
| `||`     | OR          | (x > 10 || y < 5)       | true    |
| `!`      | NOT         | !(x == y)               | true    |

🎯 **JavaScript Conditional (Ternary) Operator**

The ternary operator assigns a value to a variable based on a condition.

Syntax:
javascript
variablename = (condition) ? value1 : value2;

Example:
javascript
let visitor = "PRES";
let greeting = (visitor == "PRES") ? "Dear President " : "Dear ";

console.log(greeting); // Output: "Dear President "


Explanation:

If visitor is "PRES", greeting will be "Dear President ". Otherwise, it will be "Dear".