Remote-processing CAMBASIC Instrukcja Użytkownika Pobierz pdf (Strona 98)

Commands - 65

INSTR

Function

SYNTAX: a = INSTR(n,string,substring)

PURPOSE: Returns the position of the first occurrence on a sub-string within a string.

REMARK S: The parameter n spe cifies where the sear ch is to start in the string. A “1” signifies the leftmost

position in the string. This parameter is not optional. Its range is 1 to 252.

string is a string constant or string variable that is to be searched.

substring is the string variable or constant to be searched for.

If n is greater than the length of string or if string is null or if substring cannot be found, INSTR

returns zero. If substring is null, INST R returns n or one.

RELATED: LEFT$, RIGHT$, LEN and MID$

EXAMPLE: 10 A$="BOOHOO"

20 B$="HOO"

30 PRINT INSTR(1,A$,B$)

RUN

ERROR: < Illegal argument> – if n < 1

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 207 208

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Remote-processing CAMBASIC Instrukcja Użytkownika Strona 98