< > BotCompany Repo | #1000567 // isInteger

JavaX fragment (include)

static bool isInteger(String s) {
  int n = l(s);
  if (n == 0) ret false;
  int i = 0;
  if (s.charAt(0) == '-')
    if (++i >= n) ret false;
  while (i < n) {
    char c = s.charAt(i);
    if (c < '0' || c > '9') ret false;
    ++i;
  }
  ret true;
}

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