How to check a boolean condition in EL?

Question

Is this correct?

<c:if test="${theBooleanVariable == false}">It's false!</c:if>

Or could I do this?

<c:if test="${!theBooleanVariable}">It's false!</c:if>

score 127 · Accepted Answer · answered Oct 12 '10 at 14:36

You can have a look at the EL (expression language) description here.

Both your code are correct, but I prefer the second one, as comparing a boolean to true or false is redundant.

For better readibility, you can also use the not operator:

<c:if test="${not theBooleanVariable}">It's false!</c:if>

score 21 · Answer 2 · answered Oct 12 '10 at 14:35

21

Both works. Instead of == you can write eq

answered Oct 12 '10 at 14:35

kiritsuku

score 4 · Answer 3 · answered Jul 07 '15 at 19:32

4

You can check this way too

<c:if test="${theBooleanVariable ne true}">It's false!</c:if>

answered Jul 07 '15 at 19:32

Shams

3 Answers3