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DOCUMENTATION CENTER SEARCH
New to
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Find your learning path
»
Mathematica
>
Core Language
>
Defining Variables and Functions
>
Assignments
>
SubtractFrom (-=)
>
BUILT-IN MATHEMATICA SYMBOL
Special Forms of Assignment
Tutorials »
|
Minus
Decrement
Subtract
AddTo
See Also »
|
Assignments
More About »
SubtractFrom
subtracts
dx
from
x
and returns the new value of
x
.
MORE INFORMATION
SubtractFrom
has the attribute
HoldFirst
.
is equivalent to
.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
In[1]:=
Out[1]=
In[2]:=
Out[2]=
Scope
(3)
Subtract from a numerical value:
Subtract from a symbolic value:
Subtract from all values in a list:
Applications
(1)
Find the last prime below one million:
Properties & Relations
(3)
SubtractFrom
is a short form of this assignment:
PreDecrement
is a special case of
SubtractFrom
:
AddTo
is closely related:
Possible Issues
(1)
A variable to be decremented must have an initial value:
SEE ALSO
Minus
Decrement
Subtract
AddTo
TUTORIALS
Special Forms of Assignment
MORE ABOUT
Assignments
New in 1
is equivalent to 
.
EXAMPLES
Basic Examples 
Scope 