- Truth Tables
- De Morgan's Rules

Boolean expressions are used to control branches and loops in computer programs. Of course, branches and loops are fundamental to programming. This chapter shows some methods for working with boolean expressions.

**Truth tables** are used to analyze boolean expressions.

**De Morgan's** rules transform confusing boolean expressions into
easier ones.

(Review :) What is the value of: `x<12 && y>10`

Assume that `x`

contains 9 and `y`

contains 7.