Mixing
I have a for loop nested within my while loop, what is causing an infinite loop within my code?
I'm new to Python and coding in general. I am trying to use a while loop with a nested for loop to calculate the lowest % of salary that can be saved that will reach the savings goal within 36 months. The code also includes functions to apply a semi-annual raise to the salary every 6 months and to apply interest gained to the savings.
When I run my code it results in an infinite loop and I haven't been able to see what is causing it.
total_cost = 1000000
semi_annual_raise = 0.07
down_payment = 0.25*total_cost
starting_salary = float(input("What is your annual salary?: "))
monthly_salary = starting_salary/12.0
r = 0.04
steps = 0
epsilon = 100
low = 0
high = 10000
portion_saved = (high + low)/2.0
current_savings = 0
raise_counter = 0
while abs(current_savings - down_payment) > epsilon:
current_savings = 0
for months in range(36):
current_savings += (current_savings*r/12) + (monthly_salary*
(portion_saved/10000))
if raise_counter == 6:
monthly_salary += monthly_salary*semi_annual_raise
raise_counter = 0
raise_counter += 1
if current_savings < down_payment:
low = portion_saved
else:
high = portion_saved
portion_saved = (high + low)/2.0
steps += 1
raise_counter = 0
print ("Number of steps =", steps)
print ("Optimal % to save:", portion_saved/10000)
python-3.x for-loop if-statement while-loop bisection
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
add a comment |
I'm new to Python and coding in general. I am trying to use a while loop with a nested for loop to calculate the lowest % of salary that can be saved that will reach the savings goal within 36 months. The code also includes functions to apply a semi-annual raise to the salary every 6 months and to apply interest gained to the savings.
When I run my code it results in an infinite loop and I haven't been able to see what is causing it.
total_cost = 1000000
semi_annual_raise = 0.07
down_payment = 0.25*total_cost
starting_salary = float(input("What is your annual salary?: "))
monthly_salary = starting_salary/12.0
r = 0.04
steps = 0
epsilon = 100
low = 0
high = 10000
portion_saved = (high + low)/2.0
current_savings = 0
raise_counter = 0
while abs(current_savings - down_payment) > epsilon:
current_savings = 0
for months in range(36):
current_savings += (current_savings*r/12) + (monthly_salary*
(portion_saved/10000))
if raise_counter == 6:
monthly_salary += monthly_salary*semi_annual_raise
raise_counter = 0
raise_counter += 1
if current_savings < down_payment:
low = portion_saved
else:
high = portion_saved
portion_saved = (high + low)/2.0
steps += 1
raise_counter = 0
print ("Number of steps =", steps)
print ("Optimal % to save:", portion_saved/10000)
python-3.x for-loop if-statement while-loop bisection
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
current_savingsgoes only up anddown_paymentdoes not change? In this case the conditionabs(current_savings - down_payment) > epsilonwill beTrueforever.
– Poolka
Nov 20 '18 at 6:58
@Poolka How do I reset current_savings to 0 for the beginning of each iteration of the while loop?
– Luke Paloutzian
Nov 20 '18 at 20:38
add a comment |
I'm new to Python and coding in general. I am trying to use a while loop with a nested for loop to calculate the lowest % of salary that can be saved that will reach the savings goal within 36 months. The code also includes functions to apply a semi-annual raise to the salary every 6 months and to apply interest gained to the savings.
When I run my code it results in an infinite loop and I haven't been able to see what is causing it.
total_cost = 1000000
semi_annual_raise = 0.07
down_payment = 0.25*total_cost
starting_salary = float(input("What is your annual salary?: "))
monthly_salary = starting_salary/12.0
r = 0.04
steps = 0
epsilon = 100
low = 0
high = 10000
portion_saved = (high + low)/2.0
current_savings = 0
raise_counter = 0
while abs(current_savings - down_payment) > epsilon:
current_savings = 0
for months in range(36):
current_savings += (current_savings*r/12) + (monthly_salary*
(portion_saved/10000))
if raise_counter == 6:
monthly_salary += monthly_salary*semi_annual_raise
raise_counter = 0
raise_counter += 1
if current_savings < down_payment:
low = portion_saved
else:
high = portion_saved
portion_saved = (high + low)/2.0
steps += 1
raise_counter = 0
print ("Number of steps =", steps)
print ("Optimal % to save:", portion_saved/10000)
python-3.x for-loop if-statement while-loop bisection
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
I'm new to Python and coding in general. I am trying to use a while loop with a nested for loop to calculate the lowest % of salary that can be saved that will reach the savings goal within 36 months. The code also includes functions to apply a semi-annual raise to the salary every 6 months and to apply interest gained to the savings.
When I run my code it results in an infinite loop and I haven't been able to see what is causing it.
total_cost = 1000000
semi_annual_raise = 0.07
down_payment = 0.25*total_cost
starting_salary = float(input("What is your annual salary?: "))
monthly_salary = starting_salary/12.0
r = 0.04
steps = 0
epsilon = 100
low = 0
high = 10000
portion_saved = (high + low)/2.0
current_savings = 0
raise_counter = 0
while abs(current_savings - down_payment) > epsilon:
current_savings = 0
for months in range(36):
current_savings += (current_savings*r/12) + (monthly_salary*
(portion_saved/10000))
if raise_counter == 6:
monthly_salary += monthly_salary*semi_annual_raise
raise_counter = 0
raise_counter += 1
if current_savings < down_payment:
low = portion_saved
else:
high = portion_saved
portion_saved = (high + low)/2.0
steps += 1
raise_counter = 0
print ("Number of steps =", steps)
print ("Optimal % to save:", portion_saved/10000)
python-3.x for-loop if-statement while-loop bisection
python-3.x for-loop if-statement while-loop bisection
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
edited Nov 20 '18 at 20:53
Luke Paloutzian
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
asked Nov 20 '18 at 3:44
Luke PaloutzianLuke Paloutzian
11
11
current_savingsgoes only up anddown_paymentdoes not change? In this case the conditionabs(current_savings - down_payment) > epsilonwill beTrueforever.
– Poolka
Nov 20 '18 at 6:58
@Poolka How do I reset current_savings to 0 for the beginning of each iteration of the while loop?
– Luke Paloutzian
Nov 20 '18 at 20:38
add a comment |
current_savingsgoes only up anddown_paymentdoes not change? In this case the conditionabs(current_savings - down_payment) > epsilonwill beTrueforever.
– Poolka
Nov 20 '18 at 6:58
@Poolka How do I reset current_savings to 0 for the beginning of each iteration of the while loop?
– Luke Paloutzian
Nov 20 '18 at 20:38
current_savings goes only up and down_payment does not change? In this case the condition abs(current_savings - down_payment) > epsilon will be True forever.– Poolka
Nov 20 '18 at 6:58
current_savings goes only up and down_payment does not change? In this case the condition abs(current_savings - down_payment) > epsilon will be True forever.– Poolka
Nov 20 '18 at 6:58
@Poolka How do I reset current_savings to 0 for the beginning of each iteration of the while loop?
– Luke Paloutzian
Nov 20 '18 at 20:38
@Poolka How do I reset current_savings to 0 for the beginning of each iteration of the while loop?
– Luke Paloutzian
Nov 20 '18 at 20:38
add a comment |
1 Answer
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Why have you used (monthly_salary*portion_saved/10000 ? Since you need to add the portion_saved to the current_savings each month, i would recommend you to use
current_savings+=(current_savings*r/12) + portion_saved
I think you can also simplify the process by finding the % to be saved using the below formula
monthly_salary*(save_percent/100)* 36 = down_payment-epsilon
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Why have you used (monthly_salary*portion_saved/10000 ? Since you need to add the portion_saved to the current_savings each month, i would recommend you to use
current_savings+=(current_savings*r/12) + portion_saved
I think you can also simplify the process by finding the % to be saved using the below formula
monthly_salary*(save_percent/100)* 36 = down_payment-epsilon
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
add a comment |
Why have you used (monthly_salary*portion_saved/10000 ? Since you need to add the portion_saved to the current_savings each month, i would recommend you to use
current_savings+=(current_savings*r/12) + portion_saved
I think you can also simplify the process by finding the % to be saved using the below formula
monthly_salary*(save_percent/100)* 36 = down_payment-epsilon
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
add a comment |
Why have you used (monthly_salary*portion_saved/10000 ? Since you need to add the portion_saved to the current_savings each month, i would recommend you to use
current_savings+=(current_savings*r/12) + portion_saved
I think you can also simplify the process by finding the % to be saved using the below formula
monthly_salary*(save_percent/100)* 36 = down_payment-epsilon
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
Why have you used (monthly_salary*portion_saved/10000 ? Since you need to add the portion_saved to the current_savings each month, i would recommend you to use
current_savings+=(current_savings*r/12) + portion_saved
I think you can also simplify the process by finding the % to be saved using the below formula
monthly_salary*(save_percent/100)* 36 = down_payment-epsilon
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
answered Nov 20 '18 at 10:46
Gautham MGautham M
22619
22619
add a comment |
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current_savingsgoes only up anddown_paymentdoes not change? In this case the conditionabs(current_savings - down_payment) > epsilonwill beTrueforever.– Poolka
Nov 20 '18 at 6:58
@Poolka How do I reset current_savings to 0 for the beginning of each iteration of the while loop?
– Luke Paloutzian
Nov 20 '18 at 20:38