File Extensions in C++

Before we start writing code, it is worth mentioning that C++ source files can use different file extensions.

Common C++ file extensions include:

. cc . cpp . cxx

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All three are valid for C++ source files.

In practice, .cpp and .cc are probably the most common ones. The .cxx extension is also valid, but you will usually see it less often.

For this example, let’s imagine we create a file called:

integers_floats.cpp

Integer Types in C++

An integer is a whole number without a fractional part.

Examples of integers are:

0 42 -10 100000

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In C++, integers can be either:

signed unsigned

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A signed integer can store both negative and positive values.

An unsigned integer can store only zero and positive values.

For example:

- 10 // signed 0 // signed or unsigned 42 // signed or unsigned

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