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instr ( haystack_expr , needle_expr )
instr ( haystack_expr , needle_expr , start_expr )
instr ( haystack_expr , needle_expr , start_expr , boolean_expr)
returns positive_integer_value
Check to see if the string needle_expr is contained in the string haystack_expr. If it is, then this function will return the index of starting character of the first place where needle_expr occurs. Otherwise, this function will return 0. You may also specify an optional starting location for the search to begin start_expr and a boolean_expr to specify that the search will treat upper and lower case letters the same.
String indices begin at 1.
print instr("Hello", "lo") print instr("101,222,333",",",5)
will display
4 8
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