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Learning Processing, 2nd Edition by Daniel Shiffman

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5

Conditionals

That language is an instrument of human reason, and not merely a medium for the expression of thought, is a truth generally admitted.

—George Boole

The way I feel about music is that there is no right and wrong. Only true and false.

—Fiona Apple

In this chapter:

 Boolean expressions

 Conditional statements: How a program produces different results based on varying circumstances

 If, else if, else

 Relational and logical operators

5-1 Boolean expressions

What’s your favorite kind of test? Essay format? Multiple choice? In the world of computer programming, one only takes one kind of test: a boolean test — true or false. A boolean expression (named for mathematician George Boole) is an expression that evaluates to either true or false. Let’s ...

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