BUILT-IN MATHEMATICA SYMBOL

RuleDelayed

or
represents a rule that transforms lhs to rhs, evaluating rhs only after the rule is used.

Details Details

The character can be entered as Esc:>Esc or \[RuleDelayed].
RuleDelayed has the attribute HoldRest.
You can apply rules using Replace.
The assignment specifies that the rule should be used whenever it applies.
You can use Condition to specify when a particular rule applies.
In StandardForm, RuleDelayed is printed using .

Examples Examples open all close all

Basic Examples (1)Basic Examples (1)

holds its right-hand side unevaluated:

Out[1]=

The right-hand side is evaluated separately each time it is used:

Out[2]=

Applications (3)Applications (3)

Properties & Relations (4)Properties & Relations (4)

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See Also See Also

Rule Replace SetDelayed

Tutorials Tutorials

Related Guides Related Guides

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