4.2.6. Exit() Function, Chapter - 4, Control Structures, HSSC-II (12th Class) Computer Science Key Point Notes

12th Class (HSSC-II) Computer SLO Based Key Point Notes

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Unit 4: Control Structures

4.2.6 Exit() Function

The exit() function is used to terminate a C++ program before its normal termination and exit to the operating system. It requires the standard library header file stdlib.h.

The following is the general form of the exit function.

            exit (value);

Here, value is an integer value or integer variable. It is known as the exit code. The exit code "0" exits a program without any error and exit code "1" indicates that an error must have occurred. It helps the programmer in debugging the program.

Consider the following if-else statement.

           if(n>0)

            cout<<n<<"is a positive number";

            else

            exit(0);

In the above if-else statement, the control function exit is used to terminate the execution of the if-else statement if the value of n is not greater than 0 and returns to the operating system.

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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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