EdDoc: home/built-in_functions
An index of the most useful built-in functions available to Python programmers without the need to import any modules.
| Section | Description |
|---|---|
| bin() | Used to convert an integer number to a binary string. |
| chr() | Returns the unicode character when passed its index number. The opposite of ord() |
| eval() | Returns an integer or float answer when passed a mathematical expression as a string. |
| float() | Converts an integer or a number represented as a string to a float data-type. |
| help() | Used in the Python shell, accesses the built-in help documentation. |
| hex() | Converts an integer to a hexadecimal number (represented as a string). |
| input() | Used to access user keyboard input. |
| int() | Converts a float or an integer represented as a string into an integer data-type. |
| len() | Return the length of (the number of items in) an object. |
| max() | Returns the largest item in a container data-type or a list of variables. |
| min() | Returns the smallest item in a container data-type or a list of variables. |
| open() | Used to open an external file. |
| ord() | Returns the index number of a unicode character. The opposite of chr() |
| pow() | A function that effiiciently raises a number to a given power. |
| print() | Prints to output to the Python shell. |
| range() | Produces a sequence of numbers, used extensively with Python's for loops. |
| round() | Used to round decimal numbers to a given number of decimal places. [Note: sometimes produces unexpected results] |
| sorted() | Returns a new sorted list from the items in container data-type. |
| str() | Converts an integer or float into a string. |
| sum() | Totals numbers in a container data-type which only contains integers and/or floats. |
| type() | Returns the data-type of an object when passed an identifying name. |