Python

population increasewe

Thread Solved

•

Join Date: Nov 2009

Posts: 33

Reputation: jaison2 is an unknown quantity at this point

Solved Threads: 2

jaison2

Offline

Light Poster

population increasewe

Nov 21st, 2009

The function has to show the population for year 1, 2 and so on until the population reaches 1 million. The population increases by 8% every year?

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def population():
    current=input("please enter the current population of the city: ")
increase=current/100*8+current
year 1=increase
 
while increase>1000000?
def population():
    current=input("please enter the current population of the city: ")
increase=current/100*8+current
year 1=increase

while increase>1000000?

•

Join Date: Aug 2009

Posts: 64

Reputation: Mathhax0r is an unknown quantity at this point

Solved Threads: 15

Mathhax0r

Offline

Junior Poster in Training

Nov 21st, 2009

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def population_growth(argBase, argMax, argRate):
    assert argBase < argMax
    assert argRate > 0
    theAnswer = [argBase]
    iterAnswer = argBase
    while True:
        iterAnswer *= 1+argRate
        theAnswer.append(iterAnswer)
        if iterAnswer > argMax:
            break
    return theAnswer
uBasePop = int(raw_input("Enter the base population: "))
print population_growth(uBasePop, 1000000, .08)
def population_growth(argBase, argMax, argRate):
    assert argBase < argMax
    assert argRate > 0
    theAnswer = [argBase]
    iterAnswer = argBase
    while True:
        iterAnswer *= 1+argRate
        theAnswer.append(iterAnswer)
        if iterAnswer > argMax:
            break
    return theAnswer
uBasePop = int(raw_input("Enter the base population: "))
print population_growth(uBasePop, 1000000, .08)

I didn't know what you're needs were so I made it fairly abstract. Is this what you're looking for?

•

Join Date: Nov 2009

Posts: 33

Reputation: jaison2 is an unknown quantity at this point

Solved Threads: 2

jaison2

Offline

Light Poster

Nov 22nd, 2009

•

Originally Posted by Mathhax0r

Help with Code Tags

Python Syntax (Toggle Plain Text)
def population_growth(argBase, argMax, argRate):
    assert argBase < argMax
    assert argRate > 0
    theAnswer = [argBase]
    iterAnswer = argBase
    while True:
        iterAnswer *= 1+argRate
        theAnswer.append(iterAnswer)
        if iterAnswer > argMax:
            break
    return theAnswer
uBasePop = int(raw_input("Enter the base population: "))
print population_growth(uBasePop, 1000000, .08)
def population_growth(argBase, argMax, argRate): assert argBase < argMax assert argRate > 0 theAnswer = [argBase] iterAnswer = argBase while True: iterAnswer *= 1+argRate theAnswer.append(iterAnswer) if iterAnswer > argMax: break return theAnswer uBasePop = int(raw_input("Enter the base population: ")) print population_growth(uBasePop, 1000000, .08)
I didn't know what you're needs were so I made it fairly abstract. Is this what you're looking for?

yeah i havnt learned any of the operations you have put on here such as argbase, append etc... i need to use a while loop and display the results till it reaches 1million..... thx for the help

•

Join Date: Nov 2009

Posts: 33

Reputation: jaison2 is an unknown quantity at this point

Solved Threads: 2

jaison2

Offline

Light Poster

Nov 22nd, 2009

here is my current code.. but it seems to work fine for the first year.. but the second year i want it increase 8% from the 1st year.. hw could i do tht?

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def population():
    current=input("please enter the current population of the city: ")
    increase=current/100*8+current
    i=0
    while i<1000000:
        i=i+increase
        print "The population is", i
def population():
    current=input("please enter the current population of the city: ")
    increase=current/100*8+current
    i=0
    while i<1000000:
        i=i+increase
        print "The population is", i

•

Join Date: Oct 2004

Posts: 4,659

Reputation: vegaseat is a glorious beacon of light

Solved Threads: 1089

vegaseat

Offline

DaniWeb's Hypocrite

Nov 22nd, 2009

You have to put your increase calculation in the loop.

May 'the Google' be with you!

•

Join Date: Nov 2009

Posts: 17

Reputation: tbone2sk is an unknown quantity at this point

Solved Threads: 7

tbone2sk

Offline

Newbie Poster

Nov 22nd, 2009

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def population():
    current=input("please enter the current population of the city: ")
    yearCount = 1
    print "At year 0 The population is ",current
    while current < 1000000:
        current += current*0.08
        print "At year ",yearCount,"The population is ",current
        yearCount += 1
if __name__ == '__main__':
    population()
def population():
    current=input("please enter the current population of the city: ")
    yearCount = 1
    print "At year 0 The population is ",current
    while current < 1000000:
        current += current*0.08
        print "At year ",yearCount,"The population is ",current
        yearCount += 1
if __name__ == '__main__':
    population()

•

Join Date: Nov 2009

Posts: 33

Reputation: jaison2 is an unknown quantity at this point

Solved Threads: 2

jaison2

Offline

Light Poster

Nov 22nd, 2009

•

yearCount += 1
if __name__ == '__main__':
population()[/CODE]

can you just tell me about what is happening in these lines?

•

Join Date: Nov 2009

Posts: 17

Reputation: tbone2sk is an unknown quantity at this point

Solved Threads: 7

tbone2sk

Offline

Newbie Poster

Nov 22nd, 2009

It is just a

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def main():
    main()
def main():
    main()

for testing the function population. Then all I do is call population(). If those 2 lines of code where not present then the function population would never run.
Also the yearCount is just totaling up the years.
yearCount += 1 is the same as yearCount = yearCount + 1

Last edited by tbone2sk; Nov 22nd, 2009 at 11:58 am.

•

Join Date: Jul 2009

Posts: 243

Reputation: masterofpuppets is an unknown quantity at this point

Solved Threads: 70

masterofpuppets masterofpuppets is offline

Offline

Posting Whiz in Training

Nov 22nd, 2009

here's a more general version of this

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def population( start, maxPop, rate ):
    start += ( ( float( rate ) / 100 ) * start )
    year = 1
    while start <= maxPop:
        print year, "-", int( start )
        start += ( ( float( rate ) / 100 ) * start )
        year += 1
 
startPop = input( "Enter base population: " )
lim = input( "Enter population limit: " )
rate = input( "Enter rate of change in %, ( e.g. 8 ): " )
 
population( startPop, lim, rate )
def population( start, maxPop, rate ):
    start += ( ( float( rate ) / 100 ) * start )
    year = 1
    while start <= maxPop:
        print year, "-", int( start )
        start += ( ( float( rate ) / 100 ) * start )
        year += 1

startPop = input( "Enter base population: " )
lim = input( "Enter population limit: " )
rate = input( "Enter rate of change in %, ( e.g. 8 ): " )

population( startPop, lim, rate )

My site ->> http://8masterofpuppets8.webs.com/
"My belief is stronger than your doubt."

•

Join Date: Nov 2009

Posts: 33

Reputation: jaison2 is an unknown quantity at this point

Solved Threads: 2

jaison2

Offline

Light Poster

#10

Nov 22nd, 2009

•

Originally Posted by tbone2sk

It is just a
Help with Code Tags

Python Syntax (Toggle Plain Text)
def main():
    main()
def main(): main()
for testing the function population. Then all I do is call population(). If those 2 lines of code where not present then the function population would never run.
Also the yearCount is just totaling up the years.
yearCount += 1 is the same as yearCount = yearCount + 1

if __name__ == '__main__':, is this the sam as saying def main()? and could you please tell me what you mean by totaling up the years?.. i understand the current+=current*0.08, this means that it does the interest on the predecessor and not the actual value which we have put in right?