SetDelayed• lhs := rhs assigns rhs to be the delayed value of lhs. rhs is maintained in an unevaluated form. When lhs appears, it is replaced by rhs, evaluated afresh each time. • lhs := rhs returns Null if the assignment specified can be performed, and returns $Failed otherwise.
• You can see all the assignments associated with a symbol lhs by evaluating ?lhs or by clicking  on the Calculation controller.
• See also: Clear, Set.
Examples Using InstantCalculatorsHere are the InstantCalculators for the SetDelayed function. Enter the parameters for your calculation and click Define to see the result. Plot f from 0 to 8 .
Plot f2 for x from to 2 and y from to 2.
Entering Commands DirectlyYou can paste a template for this command via the Text Input button on the SetDelayed Function Controller. Define a custom function as  . Values of the function at distinct points can be calculated.
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A plot can be generated.
The function can be symbolically manipulated.
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Multivariable functions can also be defined. This uses the ordinary mathematical notation for Exp.
Clear the function definitions.
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