how to loop with two conditions, in python?

I need to write a code that displays the a return of investments for 0 to 20 years or when the today's value has reached .5 * of the investment initial invested amount. i am stuck with the latter part. when i use an IF statment, i couldn't get any value. here is my code.

def getExpInvestAmt(investAmt, i, n):
    expInvestAmt = int(investAmt * pow(1 + i / 100, n))
    return expInvestAmt

def getPresentValue(exp_invest_amt, d, n):
    adjAmt = int(exp_invest_amt / pow(1 + d / 100, n))
    return adjAmt


def main():
    investAmt = float(input("Enter investment amount:"))
    i = float(input("Enter the expected investment growth rate:"))
    d = float(input("Enter the discount rate:"))
    n = 0
    adjA = 0
    print("Year \t Value at year($) \t Today's worth($)")
    for x in range(0, 21):  
        if adjA < 0.5 * investAmt
            break 
        expected_value = getExpInvestAmt(investAmt, i, n)
        present_value = getPresentValue(expected_value, d, n)
        n += 1
        adjA += 1
        print("{} \t {:,} \t {:,}".format(x, expected_value, present_value))


main()

this is what i am suppose to get,