As in C, every expression can serve as a statement, provided that it is followed by a semicolon ;.

In particular, assignments var=expr; are statements.

The other kinds of statements are:

• conditional: if expr then statement₁ [else statement₂];
  if expr is true, then execute statement₁;
  else, if else branch is present, execute statement₂
  Typing:
  • Requires: expr : int

• split regex: split regexp /var₁,…,var_n/ expr
  match value of expr against regexp (an explicit string constant)
  store values of parenthesized sub-regexps into variables var₁, …, var_n respectively
  Typing:
  • Requires: var : str var₁ : str … var_n : str

  Error messages:

  • "duplicate variable var_i in split regex"
    var_i appears twice or more in list of variables var₁, …, var_n