Switch

Evaluates the value paired with the first form the expression matches.

✓ checked against that system · ! checked, with disagreements (hover a chip)Wolfram LanguageSwitch✓↗

Switch(expr, form1, val1, form2, val2, ...)The first $val_i$ whose $form_i$ (evaluated) $expr$ (evaluated) equals; a bare $\_$ (Blank) as a $form_i$ always matches, as a default case. Stays unevaluated if nothing matches.

Typed signatures

Type	Package	Applies
(any, any*) -> any	combinatorics	always

Domain: Collections

Details

• Matching is structural equality only, not Wolfram's fuller pattern language — a form is either a literal value or the bare wildcard $\_$.

Examples

Basic #

match a literal form

live ↗

In$\mathrm{Switch}(2, 1, 1, 2, 2, 3, 3)$Out$2$

Scope #

fall through to a Blank default

live ↗

In$\mathrm{Switch}(99, 1, 1, \operatorname{\_}, \mathrm{other})$Out$\mathrm{other}$

About

Examples	2
Checked against	Wolfram Language 1 agree1 unevaluated
Crosswalk	Wolfram Language

See also: Do