Expressions & Assignment (SQA National 5 Computing Science): Revision Note

SET area TO length * width

area = length * width

Calculates the area of a rectangle and stores it in area

SET total TO price + tax

total = price + tax

Adds the price and tax together and stores the result in total

SET average TO (mark1 + mark2 + mark3) / 3

average = (mark1 + mark2 + mark3) / 3

Calculates the average of three marks and stores it in average

SET remainder TO number MOD 2

remainder = number % 2

Stores the remainder when number is divided by 2 in remainder

SET totalMarks TO totalMarks + score

totalMarks = totalMarks + score

Updates a running total by adding the latest score to the existing totalMarks

SEND 10 * 5 TO DISPLAY

print(10 * 5)

Calculates and immediately displays the result of multiplying 10 by 5

SEND (a + b) / 2 TO DISPLAY

print((a + b) / 2)

Outputs the average of two values without storing it

IF (number MOD 2) = 0 THEN

if number % 2 == 0:

Uses the result of an arithmetic expression to check if a number is even

SEND ROUND(price * 1.2) TO DISPLAY

print(round(price * 1.2))

Calculates and displays the rounded total after a 20% increase

SEND "Total: " & (cost + tax) TO DISPLAY

print("Total:", cost + tax)

Combines text with a calculated expression to display the total cost

Addition

+

+

Adds two numbers

Subtraction

-

-

Subtracts one number from another

Multiplication

*

*

Multiplies two numbers

Division

/

/

Divides one number by another

Modulus (remainder after division)

MOD

%

Returns the remainder of a division

Quotient (whole number division)

DIV

//

Returns the whole number result of a division

Exponentiation (to the power of)

^

**

Raises a number to the power of another

SEND "Enter a number:" TO DISPLAY
RECEIVE number FROM KEYBOARD

IF number MOD 2 = 0 THEN
    SEND "The number is even." TO DISPLAY
ELSE
    SEND "The number is odd." TO DISPLAY
END IF

user_input = int(input("Enter a number: "))

if user_input % 2 == 0:
    print("The number is even.")
else:
    print("The number is odd.")

SEND "Enter the radius of the circle:" TO DISPLAY
RECEIVE radius FROM KEYBOARD

SET area TO 3.14159 * (radius ^ 2)

SEND "The area of the circle is " & area TO DISPLAY

radius = float(input("Enter the radius of the circle: "))

area = 3.14159 * radius ** 2

print("The area of the circle with radius", radius, "is", area)

DECLARE score INITIALLY 0

REPEAT 5 TIMES
    SEND "Enter the first number:" TO DISPLAY
    RECEIVE num1 FROM KEYBOARD

    SEND "Enter the operator (+, -, *):" TO DISPLAY
    RECEIVE operator FROM KEYBOARD

    SEND "Enter the second number:" TO DISPLAY
    RECEIVE num2 FROM KEYBOARD

    IF operator = "+" THEN
        SET correctAnswer TO num1 + num2
    ELSE
        IF operator = "-" THEN
            SET correctAnswer TO num1 - num2
        ELSE
            IF operator = "*" THEN
                SET correctAnswer TO num1 * num2
            ELSE
                SEND "Invalid operator!" TO DISPLAY
            END IF
        END IF
    END IF

    SEND "What is " & num1 & " " & operator & " " & num2 & "?" TO DISPLAY
    RECEIVE userAnswer FROM KEYBOARD

    IF userAnswer = correctAnswer THEN
        SET score TO score + 1
    ELSE
        SEND "Sorry, that is incorrect." TO DISPLAY
    END IF
END REPEAT

SEND "Your score is " & score TO DISPLAY

score = 0

for x in range(5):
    num1 = int(input("Enter the first number: "))
    operator = input("Enter the operator (+, -, *): ")
    num2 = int(input("Enter the second number: "))
    user_answer = int(input("What is " + str(num1) + " " + str(operator) + " " + str(num2) + "? "))

    if operator == '+':
        correct_answer = num1 + num2
    elif operator == '-':
        correct_answer = num1 - num2
    elif operator == '*':
        correct_answer = num1 * num2
    else:
        print("Invalid operator!")
        continue

    if user_answer == correct_answer:
        score = score + 1
    else:
        print("Sorry, that's incorrect.")

print("Your score is:", score)