The document shows code that uses a while loop instead of explicitly defined variables to repeatedly take user input for numbers, add them to a running sum, and print the final sum. The solution defines an index variable i, initializes the sum to 0, and uses a while loop repeating 3 times to take input, add it to the sum, increment i, and after the loop prints the sum. This allows summing an unknown number of user inputs using a loop instead of separate variable definitions.

1. Using Python convert the following to a while-loop construct. You need not use all the defined
variables.
def main ():
sum = 0
number_1 = input(“Enter a number”)
number_2 = input(“Enter a number”)
number_3 = input(“Enter a number”)
sum = number_1+number_2+number_3
print(sum)
main()
Solution
Answer:
def main ():
sum = 0
i = 0
while i < 3:
sum = sum + input("Enter a number")
i = i + 1
print(sum)
main();
Output:
sh-4.3$ python
main.py
Enter a
number2
Enter a
number3
Enter a
number4

2. 9