Bronze Edition Guide - True BASIC

C. Built-in Functions 177
MOD Function
MOD(numeric-expression, numeric-expression)
Returns x modulo y, provided y is not equal to zero.
NCPOS Function
NCPOS(string-expression, string-expression)
NCPOS(string-expression, string-expression, rnumeric-expression)
Returns the position of the first occurrence in the first argument of any character that is
not in the second argument. If all characters in the first argument appear in the second
argument, or the first argument is empty, then NCPOS returns 0. If the second argument
is empty but not the first, then NCPOS returns 1.
If a third argument is present, then the search for the first non-occurrence starts at the character
position in the first string given by that number and proceeds to the right. If the second
argument is empty but not the first, then NCPOS returns the starting position.
The first form of NCPOS is equivalent to the second form with the third argument equal to
one.
NCPOSR Function
NCPOSR(string-expression, string-expression)
NCPOSR(string-expression, string-expression, rnumeric-expression)
Returns the position of the last occurrence in the first argument of any character that is not
in the second argument. If all characters in the first argument appear in the second argument,
or if the first argument is empty, then NCPOSR returns 0. If the second argument is
empty but not the first, then NCPOSR returns the length of the first string.
If a third argument is present, then the search for the last non-occurrence starts at the character
position in the first string given by that number and proceeds to the left (that is, backwards).
If the second argument is empty but not the first, then NCPOSR returns the starting
value.
The first form of NCPOSR is equivalent to the second form with the third argument equal
to the length of the first argument.
NUL$ Array Constant
NUL$ redim
NUL$
NUL$ is an array constant that yields a string array consisting entirely of empty strings.
NUL$ can appear only in a MAT assignment statement.