J277.2.1.2.L2.A2

Write an algorithm using Exam Reference Language for problem below

a)         The program asks the user to enter the number of hours they have been working for.

The system must output:

·         the number of minutes they have been working

·         the number of seconds they have been working.

Answer explanation

hoursWorked = input("Enter the number of hours worked")

numberMinutes = hoursWorked * 60

numberSeconds = numberMinutes * 60

print ("number of minutes = " + numberMinutes)

print ("number of seconds = " + numberSeconds)

The program asks the user to enter two numbers. Output the largest of these two numbers.

Answer explanation

num1 = input("Enter the first number")

num2 = input("Enter the second number")

if num1 > num2 then

print(num1 + " is larger")

elseif num2 > num1 then

print(num2 + " is larger")

else

print("The numbers are the same")

endif

The program that asks the user to enter the number of letters in the alphabet. Output whether they got it correct, or incorrect.

Answer explanation

answer = input("How many letters are in the alphabet?")

if answer == 26 then

print("Correct")

else

print("Incorrect")

endif

The program asks the user to enter a number. The program then outputs the times table for that number, e.g. if they enter 5 it displays 5, 10, 15 etc.

Answer explanation

number = input("Enter a number")

for x = 1 to 12

print(x * number)

next x

The program asks the user to enter a number. The program then outputs the times table for that number, e.g. if they enter 5 it displays 5, 10, 15 etc.

Answer explanation

number = input("Enter a number")

for x = 1 to 12

print(x * number)

next x

The program asks the user for two numbers and a symbol (+, -, /, * or ^). The program then outputs the calculation based on the symbol, e.g. if 2, 3 and + were entered it would output 2 + 3 = 5.

Answer explanation

num1 = input("Enter a number")

num2 = input("Enter a number")

symbol = input("Enter a symbol")

if symbol == "+" then

print(num1 + num2)

elseif symbol == "-" then

print(num1 – num2)

elseif symbol == "/" then

print(num1 / num2)

elseif symbol == "*" then

print(num1 * num2)

elseif symbol == "^" then

print(num1 ^ num2)

else

print("Invalid symbol")

endif

The amount of water in a fish tank, in litres, is calculated using the formulae:

(height x width x depth) / 1000.

The program must take the height, width and depth as input and output a suitable message e.g. The tank holds 221.6 litres of water.

Answer explanation

height = input("Enter the tank height")

width = input("Enter the tank width")

depth = input("Enter the tank depth")

water = (height width depth) / 1000

print("The tank holds " + water + " litres of water")

The program takes a number as input, and then outputs this many # symbols.

Answer explanation

number = input("Enter a number")

for x = 0 to number

print "#"

next x

A program asks the user to input an even number. If the user enters an invalid input (e.g. an odd number) then it tells them their input is invalid and asks for the input again.

Answer explanation

do

number = input("Enter an even number")

check = number MOD 2

if check == 1 then

print("This is an odd number")

evenNumber = False

elseif check == 0 then

print("This is an even number")

evenNumber = true

endif

while evenNumber != true

The program asks for a user's age, and their favourite number. The system must output:

the two numbers added together

the two numbers multiplied together.

Answer explanation

age = input("Enter age")

favNum = input("Enter favourite number")

print (age + favNum)

print (age * favNum)