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comingsoon
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Posted on 020613 12:22
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Dear programmer and engineers.
Please help me how to programe this in python.
should print like this.
>>> 12+3=2
Thanks in advance.




alece
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Posted on 020613 9:43
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like this ? print (12+3) question clear bhayena bro!! ^^



chisigma
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Posted on 020613 10:24
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do you mean this?
print "12+3=",12+3



comingsoon
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Posted on 020613 12:42
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I try this but total is not right.
also 12+34 doesn't work while user give odd number.
N = int(input("N: "))
i=1
x=2
Sum1=0
Sum2=0
while i <= N and x <=N:
print("+", i, "", x, end=' ')
i= i+2
x= x+2
Sum1=Sum1+i
Sum2=Sum2+x
print("=", Sum1Sum2)
Result
>>>
N: 4
+ 1  2 + 3  4 = 2
>>> ================================ RESTART ================================
>>>
N: 5
+ 1  2 + 3  4 = 2
>>>
Here it prints only 4, should print upto 5(user's given value) and total is not valid.
Last edited: 06Feb13 12:50 PM



Kiddo
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Posted on 020613 3:00
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You have a flaw in your logic
I am not familiar with Python programming and am no longer a programmer, but it seems fairly straight forward so I tested your logic and you are getting what you are programming.
Flaw
 First of all, how can you print two variables at a time (i and x with print function) when you might have to print odd number of variables (say N=5)? WIth you program you can only do 12+34+56 and so on, not 12+3 OR 12+34+5.
 Second, for N=5, your program will NOT run beyond those 4 since X becomes 6 which stops the program from going more than 2 iterations, hence 4 values.
Let's check it out (for N=5)
First iteration: x (initial value) = 2, x (final value)=4 //Since x=x+2
Second iteration: x (initial value) = 4, x (final value)=6
Third iteration fails as x>N
Solution
First of all, you can't print two variables at once since you can have odd number of digits (like N=5).
But, if you print one at a time, you have to alternate between + and .
You can do this in a number of ways, let's keep it simple and use i as our counter. So if i is odd (i/2 not=1) then you will print "" and add to the sum while if it is even you will do opposite:
N = int(input("N: "))
i=1
Sum=0
while i <= N:
if i/2=1: //If i is even
print(i, "+", end=' ')
Sum=Sumi
else: //if i is odd
print(i, "", end=' ')
Sum=Sum+i
i=i+1
print("=", Sum)
Like I said, I am not familiar with Python and might have my syntax wrong, but the logic should work.



comingsoon
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Posted on 020613 3:40
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Thanks kiddo, I'm now almost in the solutin. there is little thing to correct.
Code:
N = int(input("N: "))
i=1
Sum1=0
Sum2=0
while i <= N:
if i%2==0: #If i is even
print("",i, end=' ')
Sum1=Sum1+i
else: #if i is odd
print("+", i, end=' ')
Sum2=Sum2+i
i=i+1
print("=", Sum2Sum1)
Result:
N: 5
+ 1  2 + 3  4 + 5 = 3
>>> ================================ RESTART ================================
>>>
N: 3
+ 1  2 + 3 = 2
>>> ================================ RESTART ================================
>>>
N: 4
+ 1  2 + 3  4 = 2
How to remove + sign before 1
should look like this
12+34=2



comingsoon
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Posted on 020613 3:55
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Thanks everyone, specially thanks kiddo for your help.
I got a solution printing 1 before the loop and starting counter i=2, But I feel like very Tori Method .
if someone have different idea please suggest me, I wanna learn.



prankster
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Posted on 020613 3:55
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N = int(input("N: "))
i=1
Sum=0
while i <= N:
if i%2==0:
if (i !=1)
print("") #If i is even
print(i)
Sum=Sumi
else:
if (i !=1)
print("+") #if i is odd
print(i)
Sum=Sum+i
i=i+1
print("=", Sum)
Last edited: 06Feb13 03:56 PM



Kiddo
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Posted on 020613 4:01
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While changing the syntax (i%2 instead of i/2) is understandable, I don't know why you changed the logic? If you keep my logic intact, you should get it the way you want it, i.e 12+34+5=3
N = int(input("N: "))
i=1
Sum=0
while i <= N:
if i%2==0: #If i is even
print(i, "+", end=' ')
Sum=Sumi
else: #if i is odd
print(i, "", end=' ')
Sum=Sum+i
i=i+1
print("=", Sum)



prankster
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Posted on 020613 4:08
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@Kiddo, just wondering won't urs result into
12+34+5=3



comingsoon
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Posted on 020613 4:22
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Sorry kiddo, there was some syntax error so I modifed and came to my way. I am using python 3.2.3.
There is extra sign at last of the series.
Here is result of your last code.
N: 5
1  2 + 3  4 + 5  = 3
>>> ================================ RESTART ================================
>>>
N: 4
1  2 + 3  4 + = 2
>>>
prankster,
your code don't render 1 at begining and series start from  sign, same problem as we discuss here. Here is the result.
>>> ================================ RESTART ================================
>>>
N: 5

2
+
3

4
+
5
= 2
>>> ================================ RESTART ================================
>>>
N: 4

2
+
3

4
= 3



prankster
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Posted on 020613 4:29
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I'm not familiar with python either, following if should only be for print("") and not print(i) . and i assume, end=' ' is for not adding line break.
if (i !=1)
print("")
N = int(input("N: "))
i=1
Sum=0
while i <= N:
if i%2==0:
if (i !=1):
print("") #If i is even
print(i)
Sum=Sumi
else:
if (i !=1):
print("+") #if i is odd
print(i)
Sum=Sum+i
i=i+1
print("=", Sum)
probably that would work, pls add end = ' ' to all the print statement



magorkhe1
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Posted on 020613 4:40
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EDX.ORG has many online courses. MIT is offering Python and it started yesterday. Anybody interested can sign any time and any courses.
https://www.edx.org/



Kiddo
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Posted on 020613 4:45
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You both are right, it will have the sign at the end. I am done for today and will look at it tomorrow in case prankster's doesn't work.



comingsoon
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Posted on 020613 5:07
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prankstar there is still same problem, I modefied little bit for syntax error here is result.
>>> ================================ RESTART ================================
>>>
N: 7

2
+
3

4
+
5

6
+
7
= 3
>>>
I'm not worried for same line but 1 is missing from begining. I am still try to modify if i can get that 1 on begining. Thanks Last edited: 06Feb13 05:08 PM



prankster
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Posted on 020613 5:33
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did you put indentation for print(i)
print("")
print(i)
I went to http://mathcs.holycross.edu/~kwalsh/python/
and tried following code,
N = 5
i=1
Sum=0
while i <= N:
if i%2==0:
if (i !=1):
print ""
print i
Sum=Sumi
else:
if (i !=1):
print "+"
print i
Sum=Sum+i
i=i+1
print "=" + str(Sum)
The output was,
1

2
+
3

4
+
5
=3



comingsoon
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Posted on 020613 5:53
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I got the point. It's looks perfect now. Thanks much.

