### .Js

## Operators

Operators in JavaScript are fundamental building blocks used to perform operations on variables and values. Here are some of the basic operators in JavaScript:

### Arithmetic Operators:

Arithmetic operators are used to perform mathematical operations on numerical values. They include addition, subtraction, multiplication, division, modulus (remainder), increment, and decrement.

let a = 10; let b = 5; let addition = a + b; // Addition let subtraction = a - b; // Subtraction let multiplication = a * b; // Multiplication let division = a / b; // Division let modulus = a % b; // Modulus (remainder of division) let increment = ++a; // Increment let decrement = --b; // Decrement

Operators | Meanings | Examples | Results |
---|---|---|---|

+ | Addition | 5+3 | 8 |

- | Subtraction | 5-3 | 2 |

* | Multiplication | 5*3 | 15 |

/ | Division | 6/3 | 2 |

% | Modulus (Remainder) | 6%4 | 2 |

++ | Increment | let x = 5; x++; | x = 6 |

-- | Decrement | let y = 5; y--; | y = 4 |

### Assignment Operators:

Assignment operators are used to assign values to variables. They can also perform arithmetic operations and assign the result to the variable in a concise way.

let x = 10; x += 5; // Equivalent to x = x + 5;

Operators | Meanings | Examples | Results |
---|---|---|---|

= | Assignment | let a = 5; | a = 5 |

+= | Addition assignment | let b = 3; b += 2; | b = 5 |

-= | Subtraction assignment | let c = 7; c -= 4; | c = 3 |

*= | Multiplication assignment | let d = 4; d *= 3; | d = 12 |

/= | Division assignment | let e = 6; e /= 2; | e = 3 |

%= | Modulus assignment | let f = 5; f %= 2; | f = 1 |

### Comparison Operators:

Comparison operators are used to compare two values or expressions. They return a Boolean value (*'true'* or *'false'*) based on the comparison result. These operators include equal to, not equal to, greater than, less than, greater than or equal to, and less than or equal to.

let a = 10; let b = 5; console.log(a == b); // Equal to console.log(a != b); // Not equal to console.log(a > b); // Greater than console.log(a < b); // Less than console.log(a >= b); // Greater than or equal to console.log(a <= b); // Less than or equal to

false true true false true false

Operators | Meanings | Examples | Results |
---|---|---|---|

== | Equal to | 5 == 5 | true |

!= | Not equal to | 5 != 3 | true |

=== | Strict equal to | 5 === "5" | false |

!== | Strict not equal to | 5 !== "5" | true |

> | Greater than | 7 > 4 | true |

< | Less than | 3 < 6 | true |

>= | Greater than or equal to | 5 >= 5 | true |

<= | Less than or equal to | 4 <= 4 | true |

### Logical Operators:

Logical operators are used to combine multiple conditional statements. They are typically used in conjunction with comparison operators to create complex conditions. Logical operators include AND (*'&&'*), OR (*'||'*), and NOT (*'!'*).

let x = 10; let y = 5; let z = 15; console.log(x > y && x < z); // Logical AND console.log(x > y || x > z); // Logical OR console.log(!(x > y)); // Logical NOT

true true false

Operators | Meanings | Examples | Results |
---|---|---|---|

&& | Logical AND | (5 > 3) && (4 < 7) | true |

|| | Logical OR | (5 > 3) || (4 > 7) | true |

! | Logical NOT | !(5 > 3) | false |

### String Operators:

The string concatenation operator (*'+'*) is used to concatenate two or more strings together.

let firstName = "Ayan"; let lastName = "Sarkar"; let fullName = firstName + " " + lastName;

Operators | Meanings | Examples | Results |
---|---|---|---|

+ | Concatenation | "Hello, " + "world!" | Hello, world! |

### Unary Operators:

Unary operators work on a single operand. They include unary plus (*'+'*), unary minus (*'-'*), increment (*'++'*), decrement (*'--'*), and logical NOT (*'!'*). They are often used for mathematical operations or to invert the truth value of an expression.

let x = 10; let y = -x; // Unary minus let z = +x; // Unary plus

Operators | Meanings | Examples | Results |
---|---|---|---|

+ | Unary plus | +5 | 5 |

- | Unary minus | -5 | -5 |

! | Logical NOT | !(5 > 3) | false |

typeof | Typeof | typeof "Hello" | "string" |

**Note:** The *'typeof'* operator, specifically, returns a string indicating the type of the operand.

### Ternary Operator:

The ternary operator (*'? :'*) is a concise way of writing conditional statements. It evaluates a condition and returns one of two values depending on whether the condition is true or false.

let age = 20; let result = (age >= 18) ? "Senior" : "Minor";

Operators | Meanings | Examples | Results |
---|---|---|---|

? : | Ternary | let age = 20; (age >= 18) ? "Senior" : "Minor" | "Senior" or "Minor" |

**Note:** These operators are fundamental to JavaScript and are used extensively in programming to perform various tasks, including arithmetic operations, variable assignments, comparisons, and logical operations.

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