14.3 Boolean Coercions

A boolean may be coerced to a string; depending on whether the boolean is true or false, this string will be either "true" or "false". A string may be coerced to a boolean. The string "true" (not case-sensitive) will be true; any other string will be false.

A boolean may be coerced to an integer; depending on whether the boolean is true or false, this integer will be either 1 or 0. The integers 1 and 0 may be coerced to a boolean, yielding true and false respectively; other integers can't be coerced to a boolean.