Kernel.and

You're seeing just the macro and, go back to Kernel module for more information.

left and right

Strictly boolean "and" operator.

If left is false, returns false; otherwise returns right.

Requires only the left operand to be a boolean since it short-circuits. If the left operand is not a boolean, a BadBooleanError exception is raised.

Allowed in guard tests.

Examples

iex> true and false
false

iex> true and "yay!"
"yay!"

iex> "yay!" and true
** (BadBooleanError) expected a boolean on left-side of "and", got: "yay!"