2. Constants and Variables
character constants: 'a', 'A', 'Z' (equivalent to integers 97, 65, 90) integer constants: 0, 1, -2, 153 double precision floating point constants: 0.0, 0.1e99, -2., .1, 3e-3 symbolic constants (preprocessor macros): #define NMAX 101 #define PI (4*atan(1)) letters: a-z A-Z _ (underscore is a letter), digits: 0-9 identifier (variable name): one letter, then more letters or digits basic data types: void, char, int, double printf output formats: %c %i %e,%f,%g scanf input formats: %c %i %lf (means "long float")See: chapter2_1.c - %c vs. %i formats
numeric data types (from page 31, including char and long long)
