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<DIV><FONT size=2>Since you are updating the principal value each year, use the
following to grow the principal by the interest rate each year:</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><STRONG>principal = principal * (1 + apr)</STRONG></DIV>
<DIV><STRONG></STRONG> </DIV>
<DIV>
<DIV><FONT size=2>-Mark</FONT></DIV></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV>"bob gailer" <<A
href="mailto:bgailer@gmail.com">bgailer@gmail.com</A>> wrote in message <A
href="news:49761FDC.5020800@gmail.com">news:49761FDC.5020800@gmail.com</A>...</DIV>Donna
Belle Ibarra wrote:
<BLOCKQUOTE
cite=mid:fbcbd4f40901201004j5ba7654fha68628b2fe8faa34@mail.gmail.com
type="cite">Hi! I need help with program exericse #6 entitled "Futval.py"
which is a program that computes the value of an investment carried 10 years
into the future.<BR><BR>This is the coding I have.. yet it does not seem to
spit out the correct numbers (Am I using an incorrect
equation?)<BR></BLOCKQUOTE><BR>Take a look at <A class=moz-txt-link-freetext
href="http://en.wikipedia.org/wiki/Time_value_of_money#Present_value_of_a_future_sum">http://en.wikipedia.org/wiki/Time_value_of_money#Present_value_of_a_future_sum</A>
for the various formulas. I am not sure which applies in your case.<BR><BR>
<BLOCKQUOTE
cite=mid:fbcbd4f40901201004j5ba7654fha68628b2fe8faa34@mail.gmail.com
type="cite"><BR><B>def main():<BR> print "This program
calculates the future value"<BR> print "of a 10-year
investment."<BR><BR> principal = input("Enter the amount
invested each year: ")<BR> apr = input("Enter the annual
interest rate: ")<BR> years = input("Enter the number of
years: ")<BR><BR> for i in range (1, years +
1):<BR> principal = principal * (1
+ apr)**i<BR> print "The value
in", i, " years is:", principal<BR><BR>main()</B><BR><BR>The output is
suppose to appear like this:<BR><BR>This program calculates the future value
of a 10-year investment.<BR>Enter the amount invested each year:
100.00<BR>Enter the annual interst rate: 0.05<BR>Enter the number of years:
10<BR>The value in 1 years is 105.0<BR>The value in 2 years is 215.25<BR>The
value in 3 years is 331.0125<BR>The value in 4 years is
452.563125<BR><BR>And so on..<BR><BR>^Please help me!!!<BR><PRE wrap=""><HR width="90%" SIZE=4>
_______________________________________________
Tutor maillist - <A class=moz-txt-link-abbreviated href="mailto:Tutor@python.org">Tutor@python.org</A>
<A class=moz-txt-link-freetext href="http://mail.python.org/mailman/listinfo/tutor">http://mail.python.org/mailman/listinfo/tutor</A>
</PRE></BLOCKQUOTE><BR><BR>
<DIV class=moz-signature>-- <BR>Bob Gailer<BR>Chapel Hill
NC<BR>919-636-4239</DIV>
<P>
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