Mathematica 9 is now available

Set

lhs = rhs evaluates rhs and assigns the result to be the value of lhs. From then on, lhs is replaced by rhs whenever it appears.
{ ,  , ... } = { ,  , ... } evaluates the  and assigns the results to be the values of the corresponding  .

• New assignments with identical lhs overwrite old ones.
• You can see all the assignments associated with a symbol lhs by evaluating ?lhs or by clicking  on the
Calculation controller.
lhs = rhs returns rhs even if for some reason the assignment specified cannot be performed.
• See also: Clear, SetDelayed.

Examples

Using InstantCalculators

Here are the InstantCalculators for the Set function. Enter the parameters for your calculation and click Define to see the result.

Entering Commands Directly

You can paste a template for this command via the Text Input button on the Set Function Controller.

Set the variable a to 3.

The variable can be used in calculations.

This is understood as a new variable. It is not interpreted as multiplication of a and b.

To multiply a and b, insert a space.

Variable names can be strings of characters such as expr. Their values can be math expressions or numerical values.

Clear the variable definitions.



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