5. Integers

In this assignment, integers are the only numerical type (there is no floating point type).

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 undergo implicit conversion 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