# ------------------------------------------------------------------------- #
# --- The first program --------------------------------------------------- #
#
# The sintax is similar to Python's but is more C-like. A Noja script 
# is a list of statements that can be of multiple kinds:
# 
#   - function declaractions
#   - expressions
#   - if-else branches
#   - while loops
#   - do-while loops
#   - return statements
#   - composit statements
#
# In general, unless it's inside strings, whitespace is ignored and 
# comments start with the # character. 
#
# The most basic yet interesting program is:

print('Hello, world!\n'); 

# as in other languages, this kind of statement is an expression.
# Expression statements require a ';' to determine their end.
#
# The print function can take any number of arguments of any type
# and doesn't add any spaces or newlines to the output. 

print(1, 2, 3, '\n');

#
# ------------------------------------------------------------------------- #
# --- Variables and expressions ------------------------------------------- #
# 
# You can set variables without declaring them first by using the
# assignment operator:

a = 5;

# which is similar to Python's assignment, but is a little different.
# In this language, assignments are considered as expressions, in fact 
# you can do things like

a = (b = 1) + 1;

# The value resulting from an assignment is the assigned value.
# After this expression, b's value is 1 and a's value is 2. 

print('b = ', b, '\n'); # b = 1
print('a = ', a, '\n'); # a = 2

# all of the basic arithmetic operators are available:

x = 1 + 1;
y = 1 - 2;
z = 3 * 2;
w = 10 / 3;

print('x = ', x, '\n'); # x = 2
print('y = ', y, '\n'); # y = -1
print('z = ', z, '\n'); # z = 6
print('w = ', w, '\n'); # w = 3

# Note how the division returns the rounded down version of the result.
# This is because the division was performed on integers. By making one
# of the operands a floating point value, also a floating point result
# is returned:

w = 10 / 3.0;

print('w = ', w, '\n'); 

# Arithmetic operators are only available for numeric types of objects.
# If you try to apply them on other kinds of types, you get a runtime
# error:

# (Uncomment the following line and run this file to get the error)
# p = 5 + 'hello'; 

# And relational operators are also available:

print(1 < 2, '\n');  # true
print(1 > 2, '\n');  # false

print(1 >= 0, '\n'); # true
print(1 <= 0, '\n'); # false

print(1 == 5, '\n'); # false
print(6 == 6, '\n'); # true

print(1 != 5, '\n'); # true
print(6 != 6, '\n'); # false

# The equal and not equal operators are available on every type of object,
# while the others are only available for numeric types.
#
# ------------------------------------------------------------------------- #
# --- The boolean type ---------------------------------------------------- #
# 

# TODO

#
# ------------------------------------------------------------------------- #
# --- The none value ------------------------------------------------------ #
# 

# TODO

#
# ------------------------------------------------------------------------- #
# ------------------------------------------------------------------------- #