I cannot use JOPtion and cannot use while loop. I have to write this in java

Write a program that will ask the user what price they paid for their new home. Ask the user what their credit score is (0 to 800). The interest rate they will received is based on their credit scores. The interest rates will be 10% for less than 500, 7% for 500 to 600, 5% for 600 to 700 and 3% for above 700. Calculate and display the interest that will be paid and the total cost of the home (no time component) Print out all information