The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance, 13 is a happy number because 12+32=10→12+02=1 . Number 32 is a happy number because 32+22=13→12+32=10→12+02=1 . Other examples of happy numbers are 7, 28, 100, 320. A number is unhappy if the process yields a 4. Which of the following constructs would we need to find out if a number is happy?(1 point)

Question

Responses

while loop
while loop

queue
queue

list
list

for loop

Answer 1

To determine if a number is happy, you would typically use a while loop. This construct allows you to repeatedly calculate the sum of the squares of the digits until you either reach 1 (indicating the number is happy) or enter a cycle (which is often indicated by reaching 4, meaning the number is unhappy).

You could also utilize a set or list to keep track of previously encountered numbers to detect cycles, but the core repeating operation is best handled with a while loop.

Therefore, the correct choice from the options given is:

• while loop