Compares two expressions and returns <b>true</b> only if both evaluate to <b>true</b>. Returns <b>false</b> if one or both evaluate to <b>false</b>. The following list shows all possible combinations:<br /><br /><tt>true && false // Evaluates false because the second is false <br />false && true // Evaluates false because the first is false <br />true && true // Evaluates true because both are true <br />false && false // Evaluates false because both are false</tt>