3. Integers

In this assignment, integers are the only numerical type (there is no floating point type). As well, they are the only type that you can store.

In this assignment integer literals are defined as being a string that contains only the numerals 0-9 with no spaces.

Assertion: All integer literals will be \(\geq 0\). (nonnegative-literals)

Examples of valid integers:

1
123
5234
01
10

Examples of invalid integers:

1.0
one
1_1
1o

As well, integers are usable in conditions and must be downcast to booleans. This means in a condtional, an integer that is not zero will be considered true and an integer that is zero will be considered false. For example:

if (999)
  print(999);
fi;
if (0)
  print(0);
fi;

produces the following output:

999