CEUC101: Computer Concepts & Programming Chapter 2.1

Questions and Answers

What is one of the most important concepts in computer programming?

Decision making and branching

Which of the following is NOT a decision making statement in C?

If statement

Loop statement (correct)

goto statement

Switch statement

The if statement is used to control the flow of execution in C programming.

True

What happens if the test condition in a simple if statement is satisfied?

The statement block is executed. Signup and view all the answers

In C programming, the __________ statement is an extension of the simple if statement.

if…else Signup and view all the answers

A program should make logical decisions based on the condition provided which results in __________.

true/false Signup and view all the answers

How many different forms can an if statement be implemented in C?

Four Signup and view all the answers

What does an if statement evaluate before transferring control?

An expression Signup and view all the answers

What must be true for the statement-x to be executed in a simple if statement?

The test condition must be satisfied. Signup and view all the answers

Study Notes

Objectives of Chapter

Understand decision making in C programming.
Develop skills using if conditions in different formats.
Learn the application of switch statements in C.
Interpret the use of if...else instead of the conditional operator.

Decision Making in C

Essential for logical decisions (true/false) based on conditions.
Programs address specific problems, requiring important decisions for solutions.
Allows control of execution flow based on decisions made.

Holiday Trip Problem Example

Decision criteria involve receiving 10,000 Rupees or more for a foreign trip.
If less than 10,000 Rupees, the plan changes to a countryside trip.
Requires designing a program that implements conditional logic.

Decision Making Statements in C

C supports decision making and branching with:
- If statement
- Switch statement
- Conditional operator statement
- Goto statement
Known as decision making or control statements, they manage the flow of execution.

Using the if Statement

The if statement controls flow based on conditions.
It involves a test condition: if (test-condition).
The expression is evaluated, directing flow based on its truth value into different program paths.

Forms of the if Statement

Simple if statement
If...else statement
Nested if...else statement
Else if ladder

Simple if Statement Structure

General structure:

if (test_condition) {
    statement-block;
}
statement x;

Executes the statement block if the condition is true, followed by statement x.
If the condition is false, the statement block is skipped, executing statement x directly.

Simple if Statement Example

Example code demonstrating user input:

#include <stdio.h>

void main() {
    int number = 0;
    printf("\nEnter an integer between 1 and 10: ");
    scanf("%d", &number);

    if (number > 7)
        printf("You entered %d which is greater than 7\n", number);

    if (number < 3)
        printf("You entered %d which is less than 3\n", number);
}