RuleDelayed

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

The character can be entered as :> or \[RuleDelayed].

RuleDelayed has the attribute HoldRest.

You can apply rules using Replace.

The assignment lhs := rhs specifies that the rule lhs :> rhs should be used whenever it applies.

You can use Condition to specify when a particular rule applies.

lhs rhs can be entered as lhs \[RuleDelayed] rhs or lhs :> rhs.

In StandardForm, RuleDelayed is printed using .

See notes for Rule.

See The Mathematica Book: Section 2.4.1 and Section A.5.5.

See also: Replace, SetDelayed, Rule.

Further Examples