Question

Which of the following statement is used when there are many alternative actions to be taken depending upon the value of a variable or expression in Java?

• A. switch
• B. for
• C. while
• D. do...while

Hint:

The {switch statement} is useful when multiple conditions depend on the value of the same variable.

Answer 1

The Correct Option is A

Step 1: Understanding decision-making statements in Java.

In Java programming, decision-making statements allow the program to execute different blocks of code depending on certain conditions. These statements help control the flow of the program based on variable values or logical expressions.

Step 2: Purpose of the switch statement.

The switch statement is used when a program must choose between many possible actions depending on the value of a variable or expression. Instead of writing multiple if–else conditions, a switch statement provides a more organized and readable way to handle multiple choices.

The switch statement compares the value of a variable with different case labels and executes the matching block of code.

Example structure:

switch(expression) {
    case value1:
        statements;
        break;

    case value2:
        statements;
        break;

    default:
        statements;
}

Step 3: Evaluation of options.

(A) switch: Correct. It is used for multiple alternative choices based on the value of an expression.

(B) for: Incorrect. It is used for looping, not decision making.

(C) while: Incorrect. It is also used for looping.

(D) do...while: Incorrect. This is another looping statement.

Step 4: Conclusion.

Thus, when many alternative actions must be taken depending on the value of a variable, the appropriate statement in Java is the switch statement.

Final Answer: switch