Page 250 - Computer_Science_F5

Questions.
(a) What is the output if the input is Akilimali J?

(b) What is the output if the input is Salome A?
(c) What is the output if the input is Abas H? Chapter Four: Object oriented programming with C++
FOR ONLINE READING ONLY
4. Write a program that asks the user to enter the length of the sides of a triangle
and outputs the shape of the triangle.
5. What is the difference between the character ‘n’ and the character ‘\n’?

Variables and constants A variable is a name that defines a specific
location in the computer memory. It is
Variables and constants are fundamental used to store data or information within
concepts in programming that enable a computer program. They are called
you to store and manipulate data. variables simply because their values
Variables are containers that hold values can be changed. Usually, variables store
that can change during execution, data of a specific data type; this means,
allowing flexibility in our code. On the to store a value into variable, you need
other hand, constants are fixed values to know its data type. Each variable in a
that cannot be modified once defined, program needs an identifier (unique name)
providing stability and consistency in to differentiate it from other variables.
your programs. Understanding how to For example, from the given scenario x, y
effectively use variables and constants and “result” stands as variable identifiers.
is essential in developing robust and
dynamic software solutions. Rules for naming variables in C++
programming
Variables (a) Commas and blank spaces are not

Consider that you have been told to store required in the variable name.
the number 5 and 2 respectively in the (b) The first character must be an
computer memory. Then, you are asked alphabet or underscore, but not a
to add 1 to the first number and store number.
the results to the memory. Afterward, (c) Variables should not be too long.
you subtract the second number from Make sure it does not exceed eight
the result you have obtained. To the characters.
computer, the same process can be (d) Special symbols such as $, &, and #
conducted as follows: are not allowed within the variable
x=5; names.
y=2; (e) Combination of numbers, alphabets,
x=x+1 and underscores are allowed in the
result=x - y; variable names.

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Student’s Book Form Five

Computer Science Form 5.indd 241 23/07/2024 12:33