How to concatenate two strings in python?-CodePudding

def f1()
   in1="hello"
   in2="world"
   for i in in1:
       for j in in2:
           print(ij)
   
f1()

There two strings in1="hello" in2="world" expected output="hweolrllod"

CodePudding user response：

You can zip to traverse the two strings together and unpack and join:

out = ''.join(x for pair in zip(in1, in2) for x in pair)

Output:

'hweolrllod'

CodePudding user response：

A faster version of @enke's answer:

"".join(a1 a2 for a1,a2 in zip(in1, in2))
#'hweolrllod'

CodePudding user response：

Another way could be to use this:-

in1="hello"
in2="world"

print("".join(map("".join, zip(in1, in2))))

CodePudding user response：

You're almost there. Make the below changes in your code:

def f1():
    in1="hello"
    in2="world"
    for i,j in zip(in1, in2):
        print(i, j, sep='', end='')
            
   
f1()

If you don't want to use zip, try this:

def f1():
    in1="hello"
    in2="world"
    idx = 0
    for i in in1:
        for j in in2[idx:]:
            print(i, j, sep='', end='')
            idx  = 1
            break

f1()

Output:

hweolrllod

CodePudding user response：

in1   in2

Creates a new, concatenated, string.

But your question seems to indicate you want them only concatenated when printing. For that, do this:

print(in1, in2, sep="")