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- (i.e. subtraction)


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 As at baseline


- (i.e. subtraction)

The subtraction operator, - (minus sign character), returns the remainder of the argument before it when the argument after it is subtracted.

$MyNumber = 3-4; 

When mixing data types (a '-' might be intended as a hyphen) or if working with lists—i.e. List & Set types—see notes under concatenation.