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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/tut1.rst | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/doc/tut1.rst b/doc/tut1.rst index 9ebc80689..277fb2988 100644 --- a/doc/tut1.rst +++ b/doc/tut1.rst @@ -489,10 +489,10 @@ Example: else: echo "unknown operating system" -The ``when`` statement is almost identical to the ``if`` statement with some +The ``when`` statement is almost identical to the ``if`` statement, but with these differences: -* Each condition has to be a constant expression since it is evaluated by the +* Each condition must be a constant expression since it is evaluated by the compiler. * The statements within a branch do not open a new scope. * The compiler checks the semantics and produces code *only* for the statements @@ -516,8 +516,8 @@ In Nim there is a distinction between *simple statements* and *complex statements*. *Simple statements* cannot contain other statements: Assignment, procedure calls or the ``return`` statement belong to the simple statements. *Complex statements* like ``if``, ``when``, ``for``, ``while`` can -contain other statements. To avoid ambiguities, complex statements always have -to be indented, but single simple statements do not: +contain other statements. To avoid ambiguities, complex statements must always +be indented, but single simple statements do not: .. code-block:: nim # no indentation needed for single assignment statement: @@ -586,9 +586,9 @@ false if they answered "no" (or something similar). A ``return`` statement leaves the procedure (and therefore the while loop) immediately. The ``(question: string): bool`` syntax describes that the procedure expects a parameter named ``question`` of type ``string`` and returns a value of type -``bool``. ``Bool`` is a built-in type: the only valid values for ``bool`` are +``bool``. The ``bool`` type is built-in: the only valid values for ``bool`` are ``true`` and ``false``. -The conditions in if or while statements should be of the type ``bool``. +The conditions in if or while statements must be of type ``bool``. Some terminology: in the example ``question`` is called a (formal) *parameter*, ``"Should I..."`` is called an *argument* that is passed to this parameter. |