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What is the purpose of short-circuiting in logical operators?
What is the purpose of short-circuiting in logical operators?
Which of the following describes a switch selection statement?
Which of the following describes a switch selection statement?
In a while loop, what will happen if the loop condition is initially false?
In a while loop, what will happen if the loop condition is initially false?
What is a key characteristic of the AND (&&) operator in short-circuit evaluation?
What is a key characteristic of the AND (&&) operator in short-circuit evaluation?
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Which of the following statements about the while loop is true?
Which of the following statements about the while loop is true?
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What is the primary purpose of the MessageBox.Show() method in .NET?
What is the primary purpose of the MessageBox.Show() method in .NET?
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In which scenario is a Do...While loop most appropriately used?
In which scenario is a Do...While loop most appropriately used?
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What is a key restriction of the foreach statement in .NET?
What is a key restriction of the foreach statement in .NET?
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What does the 'Continue' statement do in the context of loop control?
What does the 'Continue' statement do in the context of loop control?
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Which of the following accurately represents the general structure of a for loop in .NET?
Which of the following accurately represents the general structure of a for loop in .NET?
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Study Notes
IT111L Object Oriented Programming
- Course name: IT111L
- Module: 1.4-1.5
- Instructor: Mr. Adomar L. Ilao
Making Decisions
- Conditional statements are used to control the flow of a program based on certain conditions.
- The
ifstatement executes a block of code if a condition is true. - The
elsestatement executes a block of code if the condition in theifstatement is false. -
if-else if-elseladder: A series ofif-else ifstatements to check multiple conditions.
Short-Circuit Evaluation
- Logical operators
&&(AND) and||(OR) can evaluate expressions efficiently. - If the first operand in an AND expression is false, the second operand isn't evaluated.
- If the first operand in an OR expression is true, the second operand isn't evaluated.
Example using if, else if, and else
- Code example demonstrates
ifandelsestatements. - Checks if a grade is greater than or equal to 60 and the condition is true, it writes "Passed" to the console.
- if the condition is false, it writes "Failed"
Example with multiple conditional blocks
- Code example shows multiple conditions.
- Checks student grade to determine the appropriate message.
- Excellent (95-100), Very Good (90-94), Good (80-89), etc.
Switch Statements
- A multiple selection structure, equivalent to a series of
if-else ifstatements. - Works on equality tests.
- Variable tested must evaluate to an integer or string value.
- Use
breakstatements to exit each case.
Example using switch statement
- Provides a sequence of
casestatements. - Each case matches a specific value of the selected variable.
- If
defaultcase provided and the variable is not found in anycasethe default statement will execute.
Repeating Instructions
- Loops are programming constructs that repeat a block of code until a specific condition is met.
While Statement
- Pretest loop.
- Checks condition before executing the loop body.
- Condition evaluated to
trueto repeat the statements,falseend the loop. - Use curly braces
{}to enclose statements in the loop's body.
Do...While loop
- Posttest loop
- Executes at least once before checking the condition.
- If condition is
truecontinue the loop, otherwise terminates.
Example code illustrating repetition
- Example implementations for conditional statements.
- Using
for&whileloops demonstrating iterative repetition.
For Loop
- Pretest loop similar to
whileloop. - Initialization, condition checking, and updating happen in one line, making it concise.
Message Box application
-
MessageBoxused for interactive communication with the user. - Displays messages, prompts for user input, returns user decisions.
Windows application
- Code snippet for creating windows applications, adding references.
- Using system libraries.
- Calling message pop-up boxes.
MessageBox Class
- Methods within the
MessageBoxclass to display messages and get user input (likeMessageBox.Show(),MessageBoxButtons,MessageBoxIcons).
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Description
Test your understanding of conditional statements and short-circuit evaluation in Object Oriented Programming for IT111L. This quiz covers key concepts such as if, else, and evaluating logical expressions efficiently. Enhance your coding skills by assessing your knowledge on these fundamental programming principles.
