Lesson 2

Question 1

is a container (storage area) to hold data.

Answer 1

Variable

Question 2

are data used for representing fixed values. They can be used directly in the code.

Answer 2

Literals

Question 3

Rules for naming a variable

• A variable name can only have letters (both uppercase and lowercase letters), digits and
underscore.
• The first letter of a variable should be either a letter or an underscore.
• There is no rule on how long a variable name (identifier) can be. However, you may run into
problems in some compilers if the variable name is longer than 31 characters.

Question 4

a numeric literal (associated with numbers) without any fractional or exponential part.

Answer 4

Integers

Question 5

three types of integer literals in C programming:

Answer 5

1. decimal (base 10)
2. octal (base 8)
3. hexadecimal (base 16)

Question 6

a numeric literal that has either a fractional form or an exponent form.

Answer 6

Floating-point Literals

Question 7

is a sequence of characters enclosed in double-quote marks.

Answer 7

String Literals

Question 8

created by enclosing a single character inside single quotation marks

Answer 8

Floating-point Literals