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C provides a wide range of variable types.
All of the integer types plus the char are called the integral types. float and double are called the real types.
Declarations can be spread out, allowing space for an explanatory comment. Variables can also be initialised when they are declared, this is done by adding an equals sign and the required value after the declaration.
int high = 250; /* Maximum Temperature */
int low = -40; /* Minimum Temperature */
int results[20]; /* Series of temperature readings */
Type
Explanation
int
An Integer
float
A floating point (real) number
char
A single byte of memory, enough to hold a character
short
An integer, possibly of reduced range
long
An integer, possibly of increased range
unsigned
An integer with no negative range, the spare capacity being
used to increase the positive range
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