RosettaCodeData/Task/Undefined-values/Mathematica/undefined-values-1.math

a
-> a
a + a
-> 2 a
ValueQ[a]
-> False
a = 5
-> 5
ValueQ[a]
-> True
Initial data commit 2023-07-01 11:58:00 -04:00			`a`
			`-> a`
			`a + a`
			`-> 2 a`
			`ValueQ[a]`
			`-> False`
			`a = 5`
			`-> 5`
			`ValueQ[a]`
			`-> True`