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---
layout: default
class: Macro
title: substring ';' STRING ';' START ( ';' END )?
summary: Return a substring of a given string, negative indexes allowed
---
static String _substring = "${substring;<string>;<start>[;<end>]}";
public String _substring(String args[]) throws Exception {
verifyCommand(args, _substring, null, 3, 4);
String string = args[1];
int start = Integer.parseInt(args[2].equals("") ? "0" : args[2]);
int end = string.length();
if (args.length > 3) {
end = Integer.parseInt(args[3]);
if (end < 0)
end = string.length() + end;
}
if (start < 0)
start = string.length() + start;
if ( start > end ) {
int t = start;
start = end;
end = t;
}
return string.substring(start, end);
}
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