How do I extract the value of a solution returned by Solve?

Asked Apr 12 '19 at 02:57

Active Apr 12 '19 at 10:01

Viewed 49 times

For instance, I have an equation to be solved:

Solve[c == 0, c]

And of course, the result is {{c -> 0}}.

What I need is the result 0. I know that First can eliminate the brackets, but then the result becomes c -> 0. It is not what I want. So what shall I do?

edited Apr 12 '19 at 10:01

m_goldberg

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asked Apr 12 '19 at 02:57

Robin_Lyn

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c /. Solve[..], c /. First@Solve[..] or Values @ Solve[..].... – Michael E2 Apr 12 '19 at 03:01
See https://mathematica.stackexchange.com/a/18706/4999 (possible duplicate) – Michael E2 Apr 12 '19 at 03:02
@MichaelE2 Problem solved, thanks! – Robin_Lyn Apr 12 '19 at 06:48
c /. Solve[c == 0, c][[1]] or c /. Flatten[Solve[c == 0, c]] – David G. Stork Apr 12 '19 at 07:11

How do I extract the value of a solution returned by Solve?

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