====== INSTR ======

===== Syntax =====

<code basic>
N  = INSTR( A$, B$ )
N  = INSTR( X, A$, B$ )
</code>

===== Parameter =====

X  is a number, [1,MAXLEN]
A$ is a string, LEN >= 0
B$ is a string, LEN >= 0

===== Description =====

The position at which B$ occurs in A$, beginning at position 1.

The position at which B$ occurs in A$, beginning at position X.