Comparison operators

Question 1

Comparison operators

Answer 1

Used to compare different items of data

Question 2

==

Answer 2

equal to

Checks if two values are equal
Two equal signs distinguish it from assigning a value to a variable

e.g. if length == width then

Question 3

!=

Answer 3

Not equal to

Checks of two values are not equal to each other

e.g. if length != width then

Answer 4

Less than

Checks if one value is less than another

Question 5

<=

Answer 5

Less than or equal to

Checks if one value is equal or less than another

Question 6

>

Answer 6

Greater than

Checks if one value is greater than another

Question 7

> =

Answer 7

Greater than or equal to

Checks if one value is equal to or greater than another

Question 8

Comparing strings

Answer 8

These operators can also be used with strings

They are compared alphabetically

Question 9

Write an algorithm in pseudocode which asks the user to enter a number between 1 and 10 and then states if it is higher, lower, or equal to 5. [4]

Answer 9

number = input("Enter a number between 1 and 10")
if number > 5 then
    print("Higher than 5.")
elseif number < 5 then 
    print("Lower than 5.")
else
    print("You entered 5")
endif

Question 10

Write an algorithm in pseudocode which asks the user to enter a number between 1 and 10 and then states if it is higher, lower, or equal to 5. [4]

Answer 10

number = input("Enter a number between 1 and 10")
if number > 5 then
    print("Higher than 5.")
elseif number < 5 then 
    print("Lower than 5.")
else
    print("You entered 5")
endif

Question 11

Write an algorithm, in pseudocode, that allows a user to enter two values as value1 and value2 and which will switch the values, if necessary, so that they are in ascending order [2]

Answer 11

value1 = input()
value2 = input()
if value1 < value2 then
    temp = value1
    value1 = value2
    value2 = temp
endif