Intro to CS Unit 3 Review

When do you use an else statement?

• To Input a variable

• To handle string values

• To tell what will happen when an if-statement is false.

• To end an IF statement.

Write the code to test if num1 and num2 are the same.

• if (num1 = num2)

• if (num1 < num2)

• if (num1 == num2)

• if (num1 != num2)

1. Consider the following code:

word = "kangaroo"

if (word == KANGAROO"):

print ("TRUE")

else:

print ("FALSE")

What is output?

• KANGAROO

• TRUE

• FALSE

• CAPTAIN

Answer explanation

Capitalized words in a string are not equal to their lower case counter parts. So,​

“kangaroo” does not

equal “KANGAROO” which is why the output is false

3. Consider the following code:

if (90 < = x <= 100)

It should be rewritten as:

• if (90 < = x <= 100):

• if (90 < = x and <= 100):

• if (90 < = x and x <= 100):

• Nothing, the if statement is correct

Answer explanation

This correctly tests if 90 is less than or equal to x and tests if ​x is less than or equal to 100

When do you use an else statement?

• When you need something to happen when the if condition is false

• To make a follow-up True/False decision

• To allow programs to make decisions.

• To get user input

Answer explanation

An else statement will run lines​ of code when all of the other conditions that are checked are false

Write the code to test if num1 and num2 are NOT the same.

• if (num1 != num2 )

• if (num1 == num2 )

• if (num1 = num2)

• if (num1 < num2 )

What does != mean?

• equal

• not equal

• less than

• both

What does < mean?

• equal

• not equal

• less than

• greater than

What does <= mean?

• less than or equal to

• greater than or equal to

• less than

• greater than

What does = mean?

• both must be true

• set the variable to this value

• equal to

• same as