Conditional Execution - Building Java Programs: A Back to Basics Approach - page 236

Table 4.3 if/else Options
Situation Construct Basic form

You want to execute any Sequential if s

if (<test1>) {

combination of controlled

<statement1>;

statements

}
if (<test2>) {
<statement2>;

}
if (<test3>) {
<statement3>;

}

You want to execute zero Nested if s ending in test

if (<test1>) {

or one of the controlled

<statement1>;

statements

} else if (<test2>){
<statement2>;
} else if (<test3>){
<statement3>;

}

You want to execute exactly Nested if s ending in else

if (<test1>) {

one of the controlled

<statement1>;

statements

} else if (<test2>) {
<statement2>;
} else {
<statement3>;

}

Common Programming Error

Choosing the Wrong if/else Construct
Suppose that your instructor has told you that grades will be determined as follows:

A for scores ≥ 90

B for scores ≥ 80

C for scores ≥ 70

D for scores 60

F for scores < 60

≥

You can translate this scale into code as follows:

String grade;
if (score >= 90) {
grade = "A";

Continued on next page