Decisions - Java Concepts - page 286

Figure 6 shows flowcharts for these examples.

Sometimes you need to invert a condition with the ! (not) logical operator. For
example, we may want to carry out a certain action only if two strings are not equal:

if (!input.equals("S")) . . .

The ! operator takes a single condition and evaluates to true if that condition is
false and to false if the condition is true.

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Figure 6

Flowcharts for && and || Combinations

Here is a summary of the three logical operations:

A&&B

A B

true true true

true false false

false false

Any

A B A | | B

true true

Any

false true true

false false false