Solved Questions/Answers

Introduction to Programming (Chapter #: 1)

Qno1: Why do we need a programming environment?

Answer:

            Programming Environment:

            In order to correctly perform any task we need to have proper tools. Collection of all necessary tools for programming makes up a programming environment. It is essential to set up programming environment before we start writing programs. It works as a basic platform for us to write an execute programs.

Qno2: Write the steps to create a c program file in the IDE of your lab computer?

Qno3: Describe the purpose of compiler.

Answer:         

            Purpose of Compiler:

            Computer only understands and works in machine language consisting of 0’s and 1’s. A compiler is software that is responsible to conversion of a computer program written in some high level programming language to machine language code.

Qno4:  List down five reserve words in c programming language.

Answer:

            Reserve words:

1. Auto           2. Else              3. Int                4. Char                        5. for

Qno5:  Discuss the mean parts of the structure of the C program.

Qno6:  Why do we use comments in programming?

Answer:

            Comments are the statements in a program that are ignored by the compiler and do not get executed.

            Purpose:

1. They facilitate other programmers to understand our code.
2. They help us to understand our own code even after years of writing it.

Qno7:  Differentiate between constant and variables.

Answer:         

            Variables:    

1. Available is a name given to memory location as the data is physically stored inside the computer’s memory.
2. Each variable has a unique name called identifier and has a data type.
3. The value of a variable can be changed during program execution.

Constant:

1. Constants are the values that cannot be changed during program execution.
2. There are three types of constants integer constants, real constants, and character constants.

Qno8:  Write down the rules for naming a variable.

Answer:

            Rules for naming a variable:

1. Available name can only contain alphabets (uppercase or lowercase) digits and underscore.
2. Variable name must begin with a letter or an underscore; it cannot begin with the digit.
3. Reserved words cannot be used as a variable name.
4. There is no strict rule on how long available name should be, but we should choose a concise length for the variable name to follow good design practice.

Qno9:  Differentiate between char and int.

Qno10:            How can you declare and initialize variable?