# arithmetic_arranger

``````def arithmetic_arranger(problems, con = False):
#This checks the number of input problem
if len(problems) > 5 :
return('Error: Too many problems.')

#Initialization of lists, strings
foper = list()
soper = list()
opera = list()
res = list()
fline = str()
sline = str()
tline = str()
aline = str()

#Spliting the operands in the problems
for problem in problems:
problem.lstrip()
problem.rstrip()
sproblem = problem.split(" ")
if len(sproblem[0]) > 4 or len(sproblem[2]) > 4:
return('Error: Numbers cannot be more than four digits.')
if not (sproblem[1] == '+' or sproblem[1] == '-'):
return('Error: Operator must be \'+\' or \'-\'.')
foper.append(sproblem[0])
opera.append(sproblem[1])
soper.append(sproblem[2])

#The arithmetic operations
counter = 0
while counter < len(problems):
try:
a = int(foper[counter])
b = int(soper[counter])
except:
return('Error: Numbers must only contain digits.')
if opera[counter] == '+':
res.append(str(a + b))
elif opera[counter] == '-':
res.append(str(a - b))

#Finding the width of longest operand
long = max(len(foper[counter]), len(soper[counter]))

#Creation of first line
for val in range((long + 2) - len(foper[counter])):
foper[counter] = ' ' + foper[counter]
fline = fline + foper[counter] + '    '

#Creation of second line
for val in range((long + 1)- len(soper[counter])):
soper[counter] = ' ' + soper[counter]
sline = sline + opera[counter] + soper[counter] + '    '

#Creation of third line
for val in range(long + 2):
tline = tline + '-'
tline = tline + '    '

#Creation of fourth line
for val in range((long + 2) - len(res[counter])):
res[counter] = ' ' + res[counter]
aline = aline + res[counter] + '    '

counter = counter + 1

#Final output
fline = fline.rstrip()
sline = sline.rstrip()
tline = tline.rstrip()
aline = aline.rstrip()
if con == False:
arranged_problems = fline + '\n' + sline + '\n' + tline
elif con == True:
arranged_problems = fline + '\n' + sline + '\n' + tline + '\n' + aline

return arranged_problems
``````

Hello there.

Please Tell us whatâ€™s happening in your own words.

Learning to describe problems is hard, but it is an important part of learning how to code.

Also, the more information you give us, the more likely we are to be able to help.

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