If-Else-If Statements in Programming

The if-else-if statement in programming allows for multiple conditions to be evaluated in sequence. This enables more complex decision-making processes based on different scenarios. With examples and animations, explore how to use if-else-if statements effectively in your code.

• Programming
• Decision making
• Conditions
• Examples
• Animations

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Uploaded on Feb 23, 2025 | 0 Views

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1. The if-else if Statement The general form of the if-elseif statement is as follows: if (Boolean expression) { statement(s) } else if (Boolean expression) { statement(s) } else if (Boolean expression) // Incl. as many else ifs as needed for the alternatives { statement(s) } else { statement(s) } 24

2. Example Example if (x > 0) { System.out.println(x + " is positive"); } else if (x == 0) { System.out.println(x + " is zero"); } else { System.out.println(x + " is negative"); } 25

3. animation Trace if-elseifstatement Suppose score is 70.0 The condition is false if (score >= 90.0) { grade = 'A'; } else if (score >= 80.0) { grade = 'B'; } else if (score >= 70.0) { grade = 'C'; } else if (score >= 60.0) { grade = 'D'; } else { grade = 'F ; } 26

4. animation Trace if-elseifstatement Suppose score is 70.0 The condition is false if (score >= 90.0) { grade = 'A'; } else if (score >= 80.0) { grade = 'B'; } else if (score >= 70.0) { grade = 'C'; } else if (score >= 60.0) { grade = 'D'; } else { grade = 'F ; } 27

5. animation Trace if-elseifstatement Suppose score is 70.0 The condition is true if (score >= 90.0) { grade = 'A'; } else if (score >= 80.0) { grade = 'B'; } else if (score >= 70.0) { grade = 'C'; } else if (score >= 60.0) { grade = 'D'; } else { grade = 'F ; } 28

6. animation Trace if-elseifstatement Suppose score is 70.0 grade is C if (score >= 90.0) { grade = 'A'; } else if (score >= 80.0) { grade = 'B'; } else if (score >= 70.0) { grade = 'C'; } else if (score >= 60.0) { grade = 'D'; } else { grade = 'F ; } 29

7. animation Trace if-elseifstatement Suppose score is 70.0 Exit the if statement if (score >= 90.0) { grade = 'A'; } else if (score >= 80.0) { grade = 'B'; } else if (score >= 70.0) { grade = 'C'; } else if (score >= 60.0) { grade = 'D'; } else { grade = 'F ; } 30

8. Nested if-else Statements An if-else statement can contain any sort of statement within it. In particular, it can contain another if-else statement. An if-else may be nested within the "if" part. An if-else may be nested within the "else" part. An if-else may be nested within both parts. 31

9. Example 1 Example 1 32

10. Example 2 Example 2 Given three values, x, y, and z, determine the largest value and assign this value to the variable largest. 33