Page 271 - Computer_Science_F5

Computer Science IF…..ELSE statement
If you have two options to test in C++ programming, IF…THEN statement is not a
good choice to use. Instead, you can use IF…ELSE statement. IF…ELSE statement
specifies two decision-making statements where one is true and the other is false.
It carries a logical test among two options and selects one option that correlates
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to the condition. The application example of IF…..ELSE statement as shown in
Figure 4.40 is to set condition when you need to make choice among the people by
considering their gender, either male or female. The syntax of if..else statement is
given as:

if(condition)
{
statement(s); // this block will execute when condition is true.
}

else
{
statement(s); // this block will execute when condition is false
}

Figure 4.40 shows the execution flowchart of IF….ELSE statement.

True Condition False

True statement(s) False statement(s)

Figure 4.40: If…else flowchart

You can learn from the following Program Examples 4.21 on how to use the ‘If else’
to write the program.

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for Advanced Secondary Schools

Computer Science Form 5.indd 262 23/07/2024 12:34