BASIC FUNCTIONS SECTION 5, 10
INSTR
5. 10, 10 Function INSTR searches for the occurrence of one string in another,
and returns wi.th the position of the first match,
Syntax Y = INSTR ([X)A$,B$) 1<X<255
Example 10 A$ = "BASICS"
20 PRINT INSTR(A$,"S")
This program will print 3, since this is the first
occurrence of the letter S.
10 A$
= "SUPER BASICS"
20 B$
= "SI"
30 PRINT INSTR(A$,B$)
This program will print 9 as the first occurrence of SI.
10 A$
= "BASICS"
20 PRil~T INSTR ( 4 ,A$, "S")
The above program will print 6, since this is the first
occurrence of the letter S from the fourth character on-
wards in the string A$.
Remarks If B$ does not occur in A$, then O is returned. X, which
is optional and defaults to 1, is used to start the search
at a particular place within a string.
Case is also important, i.e. "s" is not the same as
11
S
11
•
VER.V09F
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