The if-else statement, Chapter - 4 Control Structures

Computer Science SLO Based Key Point Notes

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👉👉👉 Computer Science 12th Class Notes (Main Page)

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Unit 4: Control Structures

4.1.2. The if-else statement

The if-else statement is another type of decision-making statement that executes one block of statement when the condition is true and the other when it is false.

General Syntax

if (condition)
{
        statements;
}
else
{
        statements;
}

Flow chart

Explanation

The condition is evaluated.

Example:

Write a program that inputs marks and displays the result. If the marks are greater than or equal to 40 then display pass otherwise Fail.

#include<iostream.h>
#include<conio.h>
void main()
{
                clrscr();
                int marks;
                cout<<“Please enter your Marks: “;
                cin>>marks;
                if (marks >= 40)
                {
                cout<<“Congratulations, You have passed”;
                }
                else
                {
                cout<<“Sorry, Your are fail”;
                }
                getch();
}

Similar Examples as an assignment:

1. Write a program that reads a number and prints whether it is an even or odd number.
2. Write a program that reads a number and prints its square if the number is greater than 10 otherwise prints its cube.
3. Write a program that reads three numbers and prints the largest one.
4. Write a program that reads a letter and prints whether it is a lowercase or uppercase letter.

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4.1. Control Structure

4-1-1 The if statement

4.1.3. The else-if Statement:

4.1.4. The Switch Statement:

4.1.5. Differentiate between ELSE- IF and SWITCH

4.2. Loop

4.2.1. The for Loop

4.2.2. The While loop:

4.2.3. The do-while loop

4.2.4. Differentiate between while and do-while loop

4.2.5. The break and Continue Statement

4.2.6 Exit() Function

4.2.7. Nested Loop

Chapter 4 (Complete Key Point Notes)

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👉👉👉 Computer Science 12th Class Notes (Main Page)

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(National Book Foundation - As Federal Textbook Board, Islamabad 

Based on National Curriculum Pakistan 2023-2024 and Onward prescribed by Federal Board of Intermediate and Secondary Education, Islamabad, and All Pakistan Boards) 

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