Negate (unary form of Subtract) '-'
Negate is the unary form of Subtract. Negate toggles the sign of the value on its right; a positive value becomes negative and a negative value becomes positive. For example:
Val := -2 + A
Negate becomes an assignment operator when it is the sole operator to the left of a variable on a line by itself. For example:
-A
This would negate the value of A and store the result back to A.
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