Lab4x : Loan

# "{:.2f}".format
def setup():
    loan(5000,0.12,1); #5000baht 12percent 1year

def loan(amt,rate,yr):

    month=yr*12;
    ratepm=rate/12; #rate per month per year
    ppm=amt * ( ratepm / (1 - pow(1 + ratepm,-month))); #(pri+interest)
    pri=ppm; #principal
    unpaid=amt; #unpaid
    total_interest=0;
    i=1;
    print("No.     Interest    Principal      Unpaid     total interest");
    while (i<=month):
        print(i,end=' '); #NO.
        print("    ","{:10.2f}".format(ratepm*unpaid),end=' '); #interest 10.2
        total_interest+=ratepm*unpaid;
        pri=ppm-(ratepm*unpaid);
        unpaid-=pri;
        if (unpaid<0):
            unpaid=0
        print("   ","{:.2f}".format(pri),end=' ') #principal
        print("    ","{:.2f}".format(unpaid),end=' ') #unpaid
        print("      ","{:.2f}".format(total_interest),end=' ')#total_interest
        print()
        i+=1
 

setup()