Searches a string expression for occurrence of a substring
i = InStr(a, b [,m%] [, compmode])
i = InStr([m%], a, b [, compmode])
a, b: string expression or Variant expression
m%, compmode: iexp
InStr() searches through the string or string in Variant expression a starting from position m% for the substring b. If m% is not given, the search starts from the first character in string a. The compare compmode indicates how the search for b inside a is to be performed. The compmode can take the same values as the Mode Compare statement.
| compmode | meaning |
|---|---|
| 0 | binary compare (default) |
| 1 | case insensitive |
| -2 | converts both strings to uppercase before searching |
| -3 | converts both strings to lowercase before searching |
If b isn't found or if b="" the command returns 0.
Debug.Show
Trace InStr("Hello GFA", "ll", 2) // Prints 3
Trace InStr("Hello GFA", "ll") // Prints 3
Trace InStr("Hello GFA", "ll", 4) // Prints 0
Trace InStr(0, "Hello GFABASIC", "LL", 1) // 3
Trace InStr(0, "Hello GFABASIC", "LL", 0) // 0
Trace InStr("Hello GFABASIC", "LL", 0, -2) // 3
Trace InStr("Hello GFABASIC", "LL", 0, -3) // 3
EndsWith, FindFirstOf, FindLastOf, Left$, Mid$, Mode, Right$, RInStr(), StartsWith
{Created by Sjouke Hamstra; Last updated: 18/12/2022 by James Gaite}