Summary of JavaScript Operators

JavaScript operators are special symbols that perform operations on variables and values. Understanding these operators is crucial for writing effective code. Below, we summarize the main types of operators in JavaScript.

1. Arithmetic Operators

These operators are used to perform basic mathematical operations.

• Addition (+): Adds two operands.
  Example: 5 + 3 results in 8.
• Subtraction (-): Subtracts the second operand from the first.
  Example: 5 - 3 results in 2.
• Multiplication (*): Multiplies two operands.
  Example: 5 * 3 results in 15.
• Division (/): Divides the first operand by the second.
  Example: 6 / 2 results in 3.
• Modulus (%): Returns the remainder of division.
  Example: 5 % 2 results in 1.

2. Assignment Operators

These operators are used to assign values to variables.

• Simple Assignment (=): Assigns the right operand to the left operand.
  Example: let x = 5; assigns 5 to x.
• Addition Assignment (+=): Adds the right operand to the left operand and assigns the result.
  Example: x += 2; is equivalent to x = x + 2;.

3. Comparison Operators

These operators are used to compare two values and return a boolean result (true or false).

• Equal to (==): Checks if two values are equal.
  Example: 5 == '5' returns true.
• Strict Equal to (===): Checks if two values are equal and of the same type.
  Example: 5 === '5' returns false.
• Not Equal (!=): Checks if two values are not equal.
  Example: 5 != 3 returns true.
• Greater than (>): Checks if the left operand is greater than the right.
  Example: 5 > 3 returns true.

4. Logical Operators

These operators are used to combine multiple boolean expressions.

• AND (&&): Returns true if both operands are true.
  Example: true && false returns false.
• OR (||): Returns true if at least one operand is true.
  Example: true || false returns true.
• NOT (!): Inverts the boolean value.
  Example: !true returns false.

5. Conditional (Ternary) Operator

This operator is a shorthand for an if-else statement.

• Syntax: condition ? expr1 : expr2
  Example: let result = (5 > 3) ? 'Yes' : 'No'; assigns 'Yes' to result.

6. Type Operators

These operators are used to determine the type of a variable.

• typeof: Returns the data type of a variable.
  Example: typeof 'Hello' returns 'string'.

Conclusion

Understanding and using JavaScript operators effectively allows developers to manipulate data and control the flow of their programs. Practicing with these operators in different scenarios will reinforce their usage and help in building a solid foundation in JavaScript programming.