Enough JavaScript to get you Started : #6 Operators

What is Operator?

👉 An operator performs some operation on single or multiple operands (data value) and produces a result. For example 3 + 2, where + sign is an operator and 3 is left operand and 2 is right operand. + operator adds two numeric values and produces a result which is 5 in this case.

Why we use operators?

👉 to check conditions

👉 to assign values to variables

👉 to compare between 2 or more values

👉 to perform basic operations

Operators in JavaScript

👉 Arithmetic

used for performing mathematical calculations like addition , subtraction , multiplication , division , modulo etc.

👉 Example 

var numOne = 1;
var numTwo = 5;
var sum = numOne + numTwo;
var sub = numOne - numTwo;

👉 Comparison

used to compare 2 or more values , returns boolean value after checking

👉 Example 

1 == 1 // true
2 > 1 // true
2 > 3 // false
3 <=3 // true

👉 Logical

The concept of logical operators is simple. They allow a program to make a decision based on multiple conditions.

👉 Example 

👉 '&&' (logical AND) Operator
operator | value 1 | value 2 | result
&&       |   true  |  true   | true
&&       |   false |  true   | false
&&       |   true  |  false  | false
&&       |   false |  false  | false

👉 '||' (logical OR) Operator
operator | value 1 | value 2 | result
||       |   true  |  true   | true
||       |   false |  true   | true
||       |   true  |  false  | true
||       |   false |  false  | false

👉 '!' (logical not) Operator
!true = false
!false = true

👉 Ternary

The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark ( ? ), then an expression to execute if the condition is truthy followed by a colon ( : ), and finally the expression to execute if the condition is falsy.

👉 Example

true ? console.log("hey"):console.log("hi");
// returns "hey"

false ? console.log("hey"):console.log("hi");
// returns "hi"

👉 Assignment

Assignment operators are used to assigning value to a variable. The left side operand of the assignment operator is a variable and right side operand of the assignment operator is a value

👉 Example

var numOne = 1;
numOne += 5; // short hand for numOne = numOne+5; value = 6

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