Echo

Prints a value in passing, and returns it unchanged.

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

Echo(expr)Prints $expr$'s value, and returns it unchanged.

Echo(expr, label)Like $Echo(expr)$, prefixed by $label$.

Echo(expr, label, f)Like $Echo(expr, label)$, but prints $f(expr)$ instead of $expr$ itself — the RETURNED value is still $expr$, unchanged.

Typed signatures

Type	Package	Applies
(any, any?, ((any) -> any)?) console -> any	combinatorics	always

Domain: Collections

Details

• This engine has no console: printing is routed through @enumeratio/engine's message channel instead (Echo::printed for the plain form, Echo::labeled with a label), collectible with collectMessages — not skipped outright, so a caller that wants the printed text still can get it.

Examples

Basic #

Echo returns its argument unchanged

live ↗

In$\mathrm{Echo}(42)$Out$42$

About

Examples	1
Checked against	Wolfram Language 1 agree
Crosswalk	Wolfram Language

See also: AbsoluteTiming