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PowerShell Numbers

A number is a value you can count and calculate with. PowerShell adds, subtracts, multiplies, and divides numbers with simple symbols.

Add and subtract

The plus sign adds and the minus sign subtracts. Store each answer in a variable and print it.

$sum = 4 + 5
$sum
$left = 10 - 3
$left

Divide and find the remainder

Division can give a decimal answer. The percent sign gives the remainder instead.

$half = 7 / 2
$half
$left = 7 % 2
$left

Group with parentheses

Parentheses group a calculation that runs first. Without them the multiplication would run first.

$result = (2 + 3) * 4
$result

Example

$books = 3
$bookPrice = 12
$total = $books * $bookPrice
$total
$change = 50 - $total
$change

Key points

  • Addition: use the plus sign to add numbers.
  • Subtraction: use the minus sign to subtract numbers.
  • Multiplication: use the star symbol to multiply numbers.
  • Division: use the slash symbol to divide numbers. Division can give a decimal answer.
  • Remainder: use the percent sign to find what is left after division.
  • Parentheses: use parentheses to group a calculation that runs first.

In this example, the first two lines store a book count and a book price. The third line multiplies them to get the total. The last two lines print the total and the change from 50.

Try it Yourself

Edit the code, then press Run.

Running is simulated

Exercise

What is the value of 7 % 2?