18 Questions
What is the purpose of control structures in a Java program?
To determine the order in which statements are executed
Which control structure allows for alternative course of actions in a program?
Selection
What is the purpose of using loops in Java?
To control how many times an operation is performed
Which loop structure is used when the number of repetitions is known?
for loop
In Java, which loop structure is suitable when the number of repetitions is unknown?
while loop
What type of repetition structure allows the programmer to specify that an action is to be repeated while some condition remains true?
Do-while loop
What does the 'sequence' control structure in Java refer to?
Executing instructions line after line
Which control structure involves selecting sections of code within a program?
'Selection'
'While', 'do-while', and 'for' are examples of which type of structures in Java?
'Repetition/Iteration' structures
What does a repetition structure allow the programmer to specify?
How many times an operation is performed
What is the purpose of the counter in a loop?
To keep track of the number of repetitions
In pseudocode, what keyword is used to define a while loop?
while
In a while loop, when is the control condition tested?
Before the statements in the loop are executed
What does the loop body in a while loop contain?
The statements to be repeated
What is the purpose of adding 1 to the counter in a repetition loop?
To track the number of repetitions
What is the role of the control condition in a while loop?
To determine whether to execute the loop body
What happens if the control condition in a while loop is initially False?
The loop body is never executed
What is the function of the counter in a repetition loop?
To track iterations and repetitions
Study Notes
Control Structures in Java
- Control structures are used to control the flow of a Java program, allowing it to make decisions, repeat actions, and skip or exit certain sections of code.
Alternative Course of Actions
- The 'if-else' control structure allows for alternative courses of actions in a program, enabling the program to make decisions based on conditions.
Purpose of Loops
- Loops are used to repeat a section of code multiple times, either for a fixed number of iterations or until a certain condition is met.
Loop Structures
- The 'for' loop is used when the number of repetitions is known.
- The 'while' or 'do-while' loop is used when the number of repetitions is unknown.
Repetition Structure
- A repetition structure allows the programmer to specify that an action is to be repeated while some condition remains true.
Sequence Control Structure
- The 'sequence' control structure in Java refers to the execution of code in a linear order, one statement after another.
Selection Control Structure
- The 'selection' control structure involves selecting sections of code within a program based on conditions.
Types of Loop Structures
- 'While', 'do-while', and 'for' are examples of repetition structures in Java.
Repetition Structure Function
- A repetition structure allows the programmer to specify that an action is to be repeated for a specified number of iterations or until a certain condition is met.
Counter in a Loop
- The purpose of the counter in a loop is to keep track of the number of iterations.
While Loop
- In pseudocode, the keyword 'while' is used to define a while loop.
- In a while loop, the control condition is tested at the beginning of each iteration.
- The loop body in a while loop contains the code that is to be repeated.
- The purpose of adding 1 to the counter in a repetition loop is to increment the counter for each iteration.
- The role of the control condition in a while loop is to determine whether the loop body should be executed or not.
- If the control condition in a while loop is initially False, the loop body will not be executed.
- The function of the counter in a repetition loop is to keep track of the number of iterations.
Test your knowledge of the three main control structures in Java programming - Sequence, Selection, and Repetition/Iteration. Explore how these control structures determine the order in which statements or instructions are executed in a Java program.
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