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 // true2 > 1 // true2 > 3 // false3 <=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) Operatoroperator | value 1 | value 2 | result&&       |   true  |  true   | true&&       |   false |  true   | false&&       |   true  |  false  | false&&       |   false |  false  | false '!' (logical OR) Operatoroperator | 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.

 Exampletrue ? 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

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

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