Mathematica 9 is now available
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION.
Wolfram Mathematica Documentation Center
DOCUMENTATION CENTER SEARCH
New to Mathematica? Find your learning path »
Mathematica > Core Language > Defining Variables and Functions > Assignments > AddTo (+=) >
BUILT-IN MATHEMATICA SYMBOLTutorials »|See Also »|More About »

AddTo


adds dx to x and returns the new value of x.
MORE INFORMATION
  • is equivalent to .
EXAMPLESCLOSE ALL
Basic Examples   (1)
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
Scope   (3)
Add to a numerical value:
Add to a symbolic value:
Add to all values in a list:
Applications   (1)
Find the first prime above one million:
Properties & Relations   (4)
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:
Possible Issues   (1)
A variable to be incremented must have an initial value:
New in 1
Ask a question about this page  |  Suggest an improvement  |  Leave a message for the team
Format:   HTML  |  CDF