[SOLVED] How to write for loop in one line ?

Question

x="123"
sum=0

for i in x:
sum=sum+int(i)
print("sum of digits is",sum)

I want to write this for loop in one line how can I do that ?
https://code.sololearn.com/cLXij8Zqajo7/?ref=app

Answer 1

here is a short tutorial i did some months ago: "turning a for loop to a comprehension"

https://code.sololearn.com/cqnGujvL7CXe/?ref=app

Answer 2

dear all, wouldn't it be better to give the asker a chance to get his task done by himself befor we post solutions here? i mean we can give hints and guide him, so that he will grow in his skills?

BTW Frogged: the code you provided needs a closing parenthesis at the end of the line!

to Ratnapal Shende , you have done it as a regular for loop first. from there it is only a small step to a one-liner. the best way is to use a comprehension.

Answer 3

mySum=sum([int(c) for c in "123"]

Answer 4

Ratnapal Shende , it does not matter if your code is not running properly, just post it!

Answer 5

Thank you so much guys! grateful of all of you ... codemonkey Frogged Lothar

Answer 6

Frogged i will never gonna forget this pattern bro in my life...
Thank you so much..you are the best

Answer 7

I also suggest this way:

[[sum:=0],[sum:=sum+int(c) for c in "123"],[print(sum)]]

for this programm:
sum=0
for c in "123":
sum=sum+int(c)
print(sum)

because it is more generall and can also used to doe everything within this for loop and also things before and after it....

Answer 8

Use list comprehensions

https://code.sololearn.com/cGW7VrWGMjGU/?ref=app

Answer 9

Lothar tried bro but I am stucked please help me

Answer 10

OK bro agree with you Lothar

Answer 11

Lothar yes and no and i hasitated to answer.
But sometimes there are ...well known secrets...how to do it.
In this case codemonkey had a very fine answer and I hope Ratnapal Shende will remember this pattern.
In other cases I will be with you.

Answer 12

lol 🤣😂

Answer 13

Ratnapal Shende I don't think that Frogged is a bro.

Answer 14

Ratnapal Shende , please do a try by yourself first. put your code in playground and link it here. if you get stuck come back .
Thanks!

Answer 15

But I must say to maintain the proper redability and neatness of code you should not use one liners but it is totally up to yoh .

Answer 16

Zeroboy i think he is asking that in python not in java and also this is not one liner

Answer 17

Ohhh..

Answer 18

Lothar Your code is only for adding strings which should be printed...
My code can do basically everything

[dosomething(),[dosth2(i) for i in lst],dosth3()]

Answer 19

print(sum(map(int,list(x))))

you can use this line of code. you don't even need a for loop.

Answer 20

For(int i=0;i<200;i++)
{
Body of for loop
}
*First declare any variable..
*Then initialization by giving the start value..
*Condition where the program can access..
*Decrement or increament into the value...