How To Loop In The Opposite Order?

I am a beginner programmer. Here is my code: n = int(input()) from math import* for i in range(n): print(n, '\t', log10(n)) i = i + 1 n = n - 1 Its output is: 10 1.

Solution 1:

First, you don't need to increment i, because it is the loop variable and is being set to each of 0 to 9 in turn.

Then your loop is printing n first. It starts at 10, and you subtract one from it each time, so you are getting the values in descending order. Try this:

for i in range(n):
    print i+1, "\t", log10(i+1)

Solution 2:

Just use i as you variable element in the loop:

n=int(input())
import mathfor i in range(1,n+1):
    print(i,"\t",math.log10(i))

You can do this in one line like so:

print('\n'.join('{}\t{}'.format(i,math.log10(i)) for i in range(1,n+1)))

Lastly, it is not a great idea to get used to doing from math import *. Using * brings all the items in the imported module into the same namespace. Any similar object or function names in the module will overwrite other functions/objects with the same name.