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subtracts dx from x and returns the new value of x.
Subtract from a numerical value:
Subtract from a symbolic value:
Subtract from all values in a list:
Find the last prime below one million:
SubtractFrom is a short form of this assignment:
PreDecrement is a special case of SubtractFrom:
AddTo is closely related:
A variable to be decremented must have an initial value:
Minus Decrement Subtract AddTo