Python 3a - Data Types
Data Types in Python
If you are a Computer Science student you need to know about the different data types that are used in programming.
String – A sequence of alphanumeric characters (e.g. “Hello!” or “Toy Story 4” or “Boeing 747”)
Integer – A whole number (e.g. -120 or 0 or 340)
Float (also called Real) – A decimal number (e.g. -32.12 or 3.14)
Boolean – A logical operation (True or False)
Character – A single alphanumeric character (e.g. “a” or “6” or “?”) [Not used in Python as it would just be a string with a length of 1]
Converting to Another Data Type
You can convert a variable from one type to another by overwriting the variable with a different data type.
On line 1 the variable value of miles is 45.4 (a float - decimal number).
On line 2 the variable data type has been turned into an integer using the int( ) command.
Because an integer is a whole number, when miles is printed on line 3 it displays 45 with no decimal places.
str( ) converts a variable to a string.
float( ) converts a variable to a float (decimal number).