17 Questions
What type of statement is used to incorporate relational operators in C++ programs?
If statement
In C++, what is the purpose of an if statement?
To test a condition and execute different code based on the result
Which part of an if statement must the condition be enclosed in?
Parentheses
What type of comparison is a==d in the context of C++ programming?
Equality comparison
If an if statement contains only one statement following it, when are braces required?
Never required
What is the purpose of the block of code that follows an if statement?
To execute when the condition is true
What type of programs are known as data-driven programs?
Programs where the data dictates what the program does
Which statement is true about data-driven programs?
They use relational operators to control other statements
Why might you not want a computer to print every employee's paycheck for every pay period?
Some employees might be on vacation
What is the purpose of using relational operators in data-driven programs?
To conditionally control other statements
In data-driven programs, what dictates what the program does?
The data being processed
Why is it important for data-driven programs to not execute the same way every time?
To handle different scenarios based on input data
How does C++ behave when the condition in an if statement is False?
It ignores the block and moves on to the next appropriate statement
How would you best summarize the behavior of an if statement in C++?
Execute the block if the condition is True; otherwise, continue executing the program
What is the purpose of using an if statement in C++?
To make a decision based on a condition
When does the block of statements following an if statement execute in C++?
When the decision (the result of the relation) is True
In which scenario does an if statement in C++ not execute the block of statements?
When the condition is False
Study Notes
Relational Operators and Conditional Execution
- Relational operators examine literals and variables in a program and operate accordingly
- They are used to create decision statements that test relationships and make decisions about which statement to execute next
The if Statement
- The if statement is used to incorporate relational operators in C++ programs
- It allows for conditional execution, enabling the program to test for a condition and branch to different parts of the code depending on the result
- The simplest form of an if statement is:
if (condition){ Statements; } - The condition must be enclosed in parentheses and can include any relational comparison
- If the condition is True, the block of statements inside the braces executes; otherwise, it is ignored and the program continues to execute the next statement
Data-Driven Programs
- Data-driven programs are programs that don't always execute the same way every time
- They are controlled by data, which dictates what the program does
- Relational operators are used to conditionally control other statements, making it possible to create data-driven programs
How if Statements Work
- An if statement can be read as: "If the condition is True, perform the block of statements inside the braces. Otherwise, the condition must be False; so do not execute that block, but continue executing the remainder of the program as though this if statement did not exist."
- The block of statements following the if executes only if the condition is True
- If the condition is False, C++ ignores the block and executes the next statement in the program
Examples of if Statements
-
if (bigNumber > smallNumber) { bigNumber = smallNumber; cout << "bigNumber is now smallNumber"; } -
if (expression){ statement1; statement2; statement3; }
Explore the concepts of control structures in C++ programming language including the if statement, if..else statement, and the Switch Statement. Test your understanding with exercises included in the lecture content.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
