How to make a for loop in Python for exponent

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I have big problem with one task. I'm a beginner by the way.
write a program that will calculate successive powers of the number 2 in the range 0 to 8 (inclusive).
display the result as:
0: 1
1: 2
2: 4
3: 8
4: 16
etc.
Please guy, help me, i'm a beginner, but this quest is quite difficult for me right now.

What I have tried:

Python

i=0
i+=1
x=2**i
for i in range(0,8):
    print(x)

Posted 3-Nov-20 0:00am

Jonasz Urban

Updated 3-Nov-20 0:26am

OriginalGriff

v2

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OriginalGriff · Answer 1 · 2020-11-03T00:28:00

Solution 1

Look at your code:

Python

x=2**i
for i in range(0,8):
   print(x)

the value in x doesn't change inside the loop, so you will get 2 to the power of one printed each time.

Move the calculation inside the loop, and it'll work:

Python

for i in range(0,8):
   x=2**i
   print(x)

Or better:

Python

for i in range(0,8):
   print(2**i)

And discard x completely!

Posted 3-Nov-20 0:28am

OriginalGriff

Comments

Jonasz Urban 3-Nov-20 6:35am

Best solutions are the simplest one.. thanks a lot mate!

OriginalGriff 3-Nov-20 6:50am

You're welcome!

CPallini 3-Nov-20 6:37am

5.

Jonasz Urban 3-Nov-20 7:04am

and how about displaying the result as:
0:1
1:2
2:4
etc?

OriginalGriff 3-Nov-20 7:42am

How do you think?

What would you do to print two numbers on the same line if it wasn't in a loop?