<br><br><div><span class="gmail_quote">On 08/09/05, <b class="gmail_sendername"><a href="mailto:andrade1@umbc.edu">andrade1@umbc.edu</a></b> <<a href="mailto:andrade1@umbc.edu">andrade1@umbc.edu</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
below is my program. what i would like to do is to get the last line to<br>print the number of years that the user enters and also the principal</blockquote><div><br>
There are a couple (at least!) of ways to get the values into the string that you print.<br>
<br>
The first way is to pass several values to the print command:<br>
<br>
print "The value in", years, "is", principal<br>
<br>
Another way is to use placeholders:<br>
print "The value in %d years is %.2f" % (years, principal)<br>
<br>
The placeholders (shown by the % sign) get replaced by the variables in
the list, in order. "%d" means format the value as an integer. "%.2f"
means format it as a floating point value with two decimal places. See
<a href="http://diveintopython.org/native_data_types/formatting_strings.html">http://diveintopython.org/native_data_types/formatting_strings.html</a> for
more details.<br>
<br>
You could replace the main bit of the program with a single line, if you're feeling brave!<br>
<br>
principal = input("Enter the initial principal: ")<br>
apr = input("Enter the annual interest rate: ")<br>
years = input("Enter the number of years: ")<br>
print "The value in %d years will be %.2f" % (years, principal * (1 + apr)**years)<br>
<br>
Hope this is useful!<br>
<br>
Olly<br>
<br>
<br>
<br>
<br>
</div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"># A program to compute the value of an investment<br># years into the future<br><br>
def main():<br> print "This program calculates the future value of an investment over<br>years"<br><br> principal = input("Enter the initial principal: ")<br> apr = input("Enter the annual interest rate: ")
<br> years = input("Enter the number of years: ")<br><br> for i in range(10):<br> principal = principal * (1 + apr)<br><br> print "The value in years is", principal<br><br>main()<br><br>
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