why integer cannot add with string

Question

n=int(input('Enter any number :'))
str1=""
for i in range(1,n+1):
  str1+=n
print(str1)

I tried the above mentioned code and it gave me typeerror and My expectation is e.g n=5 output : 12345

cast n to a string before concatenating `str1 += str(n)` BTW why are you iterating from 1 to n+1 instead of 0 to n? — Sembei Norimaki, Dec 09 '22 at 15:29

score 1 · Answer 1 · answered Dec 09 '22 at 15:43

There are two error in your code:

You attempt to concatenate n instead of i.
It is not possible to concatenate an integer to string value.

Now, this is my suggestion:

n=int(input('Enter any number :'))
str1=""
for i in range(1,n+1):
  str1+=str(i)
print(str1)

score 0 · Answer 2 · answered Dec 09 '22 at 15:39

0

As others mentioned, you have to cast your integer into string before concatenating, Use below, this method is called as 'list comprehension'

 n=int(input('Enter any number :'))
''.join([str(i) for i in range(1,n+1)])

answered Dec 09 '22 at 15:39

ram_23

79
11

score 0 · Answer 3 · answered Dec 09 '22 at 15:43

In Python, if you try to concatenate a string with an integer using the + operator, you will get a runtime error. That's because Python is strongly typed language. There are various other ways to perform this operation. I found a lot of similar questions asked before on Stack Overflow. For example, this one might give you your answer.

why integer cannot add with string

3 Answers3