C++ for Python Programmers The PreTeXt Edition

Numeric C++ data types include int for integer, float for floating point, double for double precision floating point.

The standard arithmetic operations, +, -, *, and / are used with optional parentheses to force the order of operations away from normal operator precedence.

In Python we can use // to get integer division. In C++, we declare all data types. When two integers are divided in C++, the integer portion of the quotient is returned and the fractional portion is removed. i.e. When two integers are divided, integer division is used. To get the whole quotient, declaring one of the numbers as a float will convert the entire result into floating point.

Exponentiation in C++ is done using pow() from the cmath library and the remainder (modulo) operator is done with %.

Run the following code to see that you understand each result.

When declaring numeric variables in C++, modifiers like short, long, and unsigned can optionally be used to help to ensure space is used as efficiently as possible.