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# Compilation Steps
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1. Preprocessing: The preprocessor obeys commands that begin with #, also known as directives
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Commands for the preprocessor are called directives. Directives begin with a pound sign, and they do not end with a semicolon.
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Example:
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```c
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//
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#include <stdio.h>
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```
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2. Compiling. A compiler translates then translates the program into machine instructions.
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3. Linking: The generated objects are combined to create a complete executable.
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The preprocessor is typically integrated with the compiler.
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# Types
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## Strings
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A string literal is characters enclosed in double quotation marks.
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A newline can be inserted using `\n`.
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## Integers
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An integer is a way to store a whole number. In C, integers are signed by default.
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## Floats
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A float is a decimal value. Slower arithmetic and inexact values are both drawbacks of using floats.
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## Variables
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A variable must be declared before it is assigned.
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