*Operators* are used to perform specific operations on data, often stored in a variable. PowerShell offers multiple types of operators to manipulate data, including:

- Arithmetic Operators
- Assignment Operators
- Unary Operators
- Comparison Operators
- Logical Operators

#### Arithmetic Operators

First, let’s discuss arithmetic operators used to calculate numeric values. Arithmetic operators include:

`+`

(Addition): adds numbers and concatenates strings`-`

(Subtraction): subtracts or negates numbers`*`

(Multiplication): multiplies numbers or copies strings a specified number of times`/`

(Division): divides numbers`%`

(Modulus): returns the remainder of a division operation

PS > 5 + 5 10 PS > 25 % 3 # 25/3 = 8 remainder 1 1

Arithmetic operators are binary, meaning they require two operands to calculate the result. As we can see in the examples above, the syntax for arithmetic operators is `<Operand_1> <Arithmetic-Operator> <Operand_2>`

. Operators are best utilized when used with variables, as shown below.

PS > $number = 25 PS > $number / 5 5 PS > $number = $number * 3 PS > $number 75

#### Arithmetic Operators on Strings

PowerShell allows us to manipulate strings using the addition `+`

and multiplication `*`

operators. The `+`

operator concatenates strings, whereas the `*`

operator copies the string a specified number of times.

PS > $best_learning_platform = "Code" + "cademy" PS > $punctuation = "!" * 3 PS > $best_learning_platform + $punctuation Codecademy!!!

You can see two strings are joined to create the string `"codecademy"`

and three exclamation points are made into a string by multiplying `"!"`

by `3`

.

### Instructions

**1.**

In the PowerShell terminal, add two numbers `5`

and `2`

.

When you’re done, click the `Check Work` button.

**2.**

Now subtract `7`

from `49`

in the terminal.

When you’re done, click the `Check Work` button.

**3.**

Multiply the string `"hello"`

by 3.

When you’re done, click the `Check Work` button.

**4.**

Next, divide the number `64.209`

by `3`

.

When you’re done, click the `Check Work` button.

**5.**

Finally, get the remainder of the division of `39`

by `4`

.

When you’re done, click the `Check Work` button.