CODEWITHSUNDEEP
python
Michael Hilburt
Michael Hilburt

Reputation: 63

Why doesnt "i" get incremented in the following code

I am new to coding and just stumbled upon these lines of code in "python"

a = [1,2,3,4,"hello"]

for i in a:
   try:
       print(i)
       i + 1
       print (("i is :  %d") %(i))
   except:
       print("nope " + i  + " is a string")

The output is:

1
i is :  1
2
i is :  2
3
i is :  3
4
i is :  4
hello
nope hello is a string

1) My question is why doesnt i get incremented? 2) why doesnt i=2 i in the second print statement? 3) Does "i" get incremented at all?

Upvotes: 0

Views: 36

Answers (1)

tupui
tupui

Reputation: 6528

Because you are not over writing the variable. What you want is:

i += 1

What your code do is actually computing i+1 but it does not update the variable.

But the idea of a for loop is not to have to increment the variable yourself. It is incremented the next iteration. It you want a more complicated iteration pattern it is preferable that you create it before.

Upvotes: 1

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