Lesson 5 While Loops

When is the best time to use a while loop in your code?

• A. When you know exactly how many times you need the loop to repeat
• B. When you have random elements in your puzzle with a repeating pattern
• C. There are no identifiable patterns in a puzzle and you need simple commands
• D. Whenever you are going to use a function in your coding solution

2. What is the difference between a while loop and a for loop?

• A. For loops can use conditional statements and while loops cannot
• B. While loops repeat a set number of times and for loops repeat until their condition    is false
• C. For loops repeat a set number of times and while loops repeat until their condition is   false
• D. For loops can be used in a function and while loops cannot

Which of the following is a correct example of a while loop?

• A. for i in 1…4 {   turnLeft()   moveForward()   toggleSwitch()   }
• B. while isOnClosedSwitch {   toggleSwitch()   turnLeft()   moveForward()   }
• D. if isOnClosedSwitch {   toggleSwitch()   turnLeft()   moveForward()
• C. while i in 1…4 {   toggleSwitch()   turnLeft()   moveForward()   }

Which of the following is true about using a while loop in your code?

• A. while loops can only have one condition [no additional conditions can be added]
•  B. while loops stop running after their condition is false [Boolean]
• C. while loops stop running after they repeat the number of times you assigned
•  D. while loops are not as efficient as for loops

Which of the following is a correct example of a while loop inside of a function?

• A. func while switchAndToggle {   if isOnGem {     collectGem()   moveForward()   }   }
• B. while switchAndToggle {   if isOnGem {   collectGem()   moveForward()   }   }
• C. func switchAndToggle {   if isOnGem {   collectGem()   moveForward()   }   }
• D. func collectAndMoveForward {   while isOnGem {   collectGem()   moveForward()   }   }

How is a for loop more controlled than a while loop?

• A. A for loop only repeats the number of times you tell it to
• B. A for loop can be used inside of a function
• C. A for loop can be repeated as many times as you use it in code
• D. A for loop can contain more commands than a while loop

Which of the following is a correct example of a for loop?

• A. while for i in 1…4 {   moveForward()   collectGem()   }
• B. func for i in 1…4 {   moveForward()   collectGem()   }
• C. for i in 1…4 {   moveForward()   collectGem()   }
• D. while isOnGem {   moveForward()   collectGem()   }
  

Which of the following is an example of a way you can adjust a while loop so that it becomes even more specific?

• A. You can add additional conditional statements to your while loop with if statements and else if blocks.
• B. You can turn your while loop into a for loop so it runs the exact number of times you   need it to
• C. You can adjust the number of times your while loop will run based on the number   value you give it
• D. You can give your while loop extra commands to run

What is the definition of a while loop?

• A. Runs a block of code over and over for a set number of times
• B. A symbol or words like “and”, “or”, and “not” that connects two or more Booleans to     make conditional statements more specific
• C. A block of code that will run one time if its condition is true.
• D. A block of code that will repeatedly run while its condition is true.

What tool [that we previously learned about] could you use to create a while loop you can   use over and over again without having to retype the whole thing?

• A. for loop
• B. function
• C. conditional statements
• D. logical operators