Question

How do I make this code print the st variable rounded to 2 decimal places? Everything I have tried gives me an error.

print('Enter output filename')
name=input()
print('Enter principal amount')
p=float(input())
print('Enter term length (month)')
n=int(input())
print('Enter annual interest')
i=float(input())
j=i/12
m=p*j/(1-(1+j)**-n)
file = open(name, "w")
title = ["Month, ", "Total Accured interest, ", "Loan Balance \n"]
file.writelines(title)
first_row=["0",",","$","0.00",",","$",p," \n"]
s1=' '.join([str(elem) for elem in first_row])
file.writelines(s1)
t=0
for j in range(n):
    tai=(p*i/12)
    t=t+tai
    p=(p-m)+tai
    st=""
    ls=[j+1,",","$",t,",","$",p,"\n"]
    st=''.join([str(elem) for elem in ls])
    file.writelines(st)
file.close()

Answer 1

Code Screenshot :

Executable Code:

print('Enter output filename')
name=input()
print('Enter principal amount')
p=float(input())
print('Enter term length (month)')
n=int(input())
print('Enter annual interest')
i=float(input())
j=i/12
m=p*j/(1-(1+j)**-n)
file = open(name, "w")
title = ["Month, ", "Total Accured interest, ", "Loan Balance \n"]
file.writelines(title)
first_row=["0",",","$","0.00",",","$",p," \n"]
s1=' '.join([str(elem) for elem in first_row])
file.writelines(s1)
t=0
for j in range(n):
   tai=(p*i/12)
   t=round(t+tai,2)
   p=round((p-m)+tai,2)
   st=""
   ls=[j+1,",","$",t,",","$",p,"\n"]
   st=''.join([str(elem) for elem in ls])
   file.writelines(st)
file.close()

Sample Output :

file.txt

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