Printing numbers · Procedural

Build the idea

Start with the concept and its key vocabulary.

Key idea

Distinguish numeric values from strings and print both correctly.

Numbers do not need quotation marks. 42 is an integer, but "42" is a string made of two characters. Both can be displayed, but the computer stores and uses them differently.

Integer

A whole number with no decimal point, such as 5, -20 or 0.

Real

A number that can have a decimal part, such as 3.5.

Literal

A value written directly into the code.

Keep these in mind

Whole numbers are integers.
A number inside quotes is a string.
Negative and decimal values can also be printed.