Arithmetic operators perform arithmetic operations with numbers (literals or variables).

Here's a useful video introducing this topic:

Here is the list of JavaScript arithmetic operators:

• +  : Addition
• -  : Subtraction
• *  : Multiplication
• /  : Division
• %  : Modulus
• ++ : Increment
• -- : Decrement

The order of precedence of arithmetic operators from high to low follows:

• ++, --
• *, /, %
• +, -

Addition

_{SAMPLE CODE}

var a = 1;
var b = 2;

var ans = a + b;

console.log(ans);

_OUTPUT

3

Subtraction

_{SAMPLE CODE}

var a = 1;
var b = 2;

var ans = a - b;

console.log(ans);

_OUTPUT

-1

Multiplication

_{SAMPLE CODE}

var a = 3;
var b = 2;

var ans = a * b;

console.log(ans);

_OUTPUT

6

Division

_{SAMPLE CODE}

var a = 3;
var b = 2;

var ans = a / b;

console.log(ans);

_OUTPUT

1.5

Modulus

_{SAMPLE CODE}

var a = 3;
var b = 2;

var ans = a % b;

console.log(ans);

_OUTPUT

1

Increment
The increment operator has forms:

1. Preincrement: The increment operator is prefixed to a variable, and it ensures that the variable's value will be incremented by before it is used.
2. Postincrement: The increment operator is postfixed to a variable, and it ensures that the variable's value will be incremented by after it is used.

_{SAMPLE CODE}

var a = 3; 

// preincrement: 'a' is incremented before being assigned to 'ans' 
var ans = ++a; 
// postincrement: 'ans' is not incremented until after the line is printed.
console.log(ans++); 
console.log(ans);

_OUTPUT

4
5

Decrement
The decrement operator has forms:

1. Predecrement: The decrement operator is prefixed to a variable, and it ensures that the variable's value will be decremented by before it is used.
2. Postdecrement: The decrement operator is postfixed to a variable, and it ensures that the variable's value will be decremented by after it is used.

_{SAMPLE CODE}

var a = 3; 
// predecrement: 'a' is decremented before being assigned to 'ans' 
var ans = --a; 

// postdecrement: 'ans' is not decremented until after the line is printed.
console.log(ans--); 
console.log(ans);

_OUTPUT

2
1

Task

Given two numeric variables, and , write the following:

• Create a variable, , and assign it the sum of and .
• Create a variable, , and assign it result of subtracted from .
• Create a variable, , and assign it the product of and .
• Create a variable, , and assign it the result of of divided by .
• Create a variable, , and assign it the preincremented value of .
• Create a variable, , and assign it the predecremented value of .

Note: Do not create variables and . They have already been declared and initialized by our hidden code checker.