PowerShell: Assignment Operators

• = → addition
• += → add then assign
• -= → substract then assign
• *= → times then assign
• /= → divide then assign
• %= → take remainder then assign

• ??= → if right-hand-side is not null, assign to left-hand-side

$x = 0
$x += 2
Write-Host $x
# 2

Unary, Increment Operators

• ++ → increment by 1
• -- → decrement by 1

• If placed in front of a variable, it increase and assign first, and return the new value.
• If placed after a variable, it return the original variable value first, then increase and assign.

$x = 0

# increase by one and assign, return the new value
$result = ++$x

Write-Host $x
# 1

Write-Host $result
# 1

$x = 0

# return the value first, then increase by one and assign
$result = $x++

Write-Host $x
# 1

Write-Host $result
# 0