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Data

Values of various types   (1,  -2,  3.14,  'A',  '1',  "abc")

The C language supports:

  • atomic data: int, unsigned int, long, char, float, double
  • arrays: indexed sequences of values of one type
  • structs: collections of named heterogeneous values
For program manipulation, values are stored in memory
  • different kinds of values have different sizes (sizeof())
  • all values are ultimately represented as a sequence of bytes