Page 272 - Computer_Science_F5

Program Example 4.21:

Using ‘if ...else’ to write a program

#include<iostream> Chapter Four: Object oriented programming with C++
using namespace std;
FOR ONLINE READING ONLY
int main()
{
int marks;
cout<<”Enter marks of the student: “;
cin>>marks;
if(marks>=50)
{
cout<<”You have been selected to join form five”<<endl;
}
else
{
cout<<”You are not selected”<<endl;
}
return 0;
}

Output:

Figure 4.41: Output of the program

Note: If there is only one statement within the if block, using braces is an option.
For example, in the program IF…ELSE statement can be written as:
if(marks>=50)

cout<<”You have selected to join form 5”<<endl;
else
cout<<”You are not selected”<<endl;

Nested if statement
When a condition statement involves more than two options, more if…else should
be added within another if…else condition. Such condition statements that include
two or more if ….else statements are known as Nested if statement. The application
example of Nested if statement is during the match: a team can win, lose or draw

263
Student’s Book Form Five

Computer Science Form 5.indd 263 23/07/2024 12:34