Which answer contains only and all of the javascript arithmetic operators

JavaScript includes operators same as other languages. An operator performs some operation on single or multiple operands [data value] and produces a result. For example, in 1 + 2, the + sign is an operator and 1 is left side operand and 2 is right side operand. The + operator performs the addition of two numeric values and returns a result.

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JavaScript includes following categories of operators.

1. Arithmetic Operators
2. Comparison Operators
3. Logical Operators
4. Assignment Operators
5. Conditional Operators
6. Ternary Operator

Arithmetic Operators

Arithmetic operators are used to perform mathematical operations between numeric operands.

The following example demonstrates how arithmetic operators perform different tasks on operands.

var x = 5, y = 10;

var z = x + y; //performs addition and returns 15

z = y - x; //performs subtraction and returns 5

z = x * y; //performs multiplication and returns 50

z = y / x; //performs division and returns 2

z = x % 2; //returns division remainder 1

The ++ and -- operators are unary operators. It works with either left or right operand only. When used with the left operand, e.g., x++, it will increase the value of x when the program control goes to the next statement. In the same way, when it is used with the right operand, e.g., ++x, it will increase the value of x there only. Therefore, x++ is called post-increment, and ++x is called pre-increment.

var x = 5;

x++; //post-increment, x will be 5 here and 6 in the next line

++x; //pre-increment, x will be 7 here  

x--; //post-decrement, x will be 7 here and 6 in the next line

--x; //pre-decrement, x will be 5 here

String Concatenation

The + operator performs concatenation operation when one of the operands is of string type. The following example demonstrates string concatenation even if one of the operands is a string.

var a = 5, b = "Hello ", c = "World!", d = 10;

a + b; //returns "5Hello "

b + c; //returns "Hello World!"

a + d; //returns 15

b + true; //returns "Hello true"

c - b; //returns NaN; - operator can only used with numbers

Comparison Operators

JavaScript provides comparison operators that compare two operands and return a boolean value true or false.

var x = 5, y = 10, z = 15;

x = y; //x would be 10

x += 1; //x would be 6

x -= 1; //x would be 4

x *= 5; //x would be 25

x /= 5; //x would be 1

x %= 2; //x would be 1

 ?  : ;

var a = 10, b = 5;

var c = a > b? a : b; // value of c would be 10
var d = a > b? b : a; // value of d would be 5