and Function

Takes any number of arguments and returns zero if any argument values are logically false. If one child evaluates to false, the function does not evaluate subsequent children. If all arguments are logically true, the function returns the value of the last argument. Zero (<i>0</i> or <s>0</s>) and <null> are considered logically false.

Example 1

The following expression returns zero.

<and> <i>42</i> <s>cat</s> <i>null</i> </and>

Example 2

The following expression returns cat.

<and> <i>42</i> <s>cat</s> </and>