Number Representation
C uses different types of numbers and data differently (in memory storage and input/output)
- positive integers {1, 2, 3, ...}
- negative integers { ..., -3, -2, -1}
- zero: 0
- integers { ..., -3, -2, -1, 0, 1, 2, 3 ...}
- rational numbers: integers plus ratio of integers (1/3)
- irrational numbers: not rational numbers (pi)
- real numbers: rational + irrational numbers
- decimal numbers: numbers with decimal point (1.25)