C Programming; Lesson 3: Numbers and Characters
Numbers:
In the C language there are essentially two types of numbers:
integers
real numbers (floating-point numbers)
type bytes range value char 1 -128 to 127 int 2 -32768 to 32767 short int 2 -32768 to 32757 long int 4 -2147483648 to 2147483647 float 4 -3.4 * 10^38 to -3.4 * 10^38 and 3.4 * 10^-38 to 3.4 * 10^38 double 8 -1.7 * 10^308 to -1.7 * 10^-308 and 1.7 * 10^-308 to 1.7 * 10^308 long double 10 -1.1 * 10^4932 to -3.4 * 10^-4932 and 3.4 * 10^-4932 to 1.1 * 10^-4932
If the type of variable is defined with the additional word unsigned then the range is moved to the positive area.
Characters:
char- serves to save the ASCII values of a single character.
To save a character we use: char a = 'b';
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