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Mathematica > Core Language > Defining Variables and Functions > Assignments >

Built-in Mathematica Symbol

AddTo (+=)

x+=dx
adds dx to x and returns the new value of x.

Add to a numerical value:

Add to a symbolic value:

Add to all values in a list:

Find the first prime above one million:

AddTo is a short form of this assignment:

PreIncrement is a special case of AddTo:

SubtractFrom is closely related:

A related operation for lists is AppendTo:

A variable to be incremented must have an initial value:

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