You can assume that the input is valid, you don't need to check if the user inputs negative values.
For example:
For the bank with the following rules: at least $50,000 income per year, at least 5 years of work experience
customer who earns $60,000 per year and works 6 years, will be eligible for the loan.
But for example, with the same bank, the customer who works 10 years but makes only $40,000 per year, will be denied the loan. In this case your
program must print: income too low.
And, for example, with the same bank, the customer who makes $100,000 per year, and works 3 years, will be denied as well, and in this case
your program must print: not enough years at workplace
And, for example, with the same bank, the customer who makes
$40,000 and works 3 years will be denied as well, and your program must print: income too low and not enough years at work place