Is it possible to make a table from the output in bash?

Question

linux

I can welcome this output:
2125
node1
2058
node2
258545
node1
to this output:
2125 node1
2058 node2
258545 node1
So that the first line goes into the first column, the second into the second, the third again into the first, etc.

Answer 1

~  cat file.txt
1
one
2
two
3
tree
 ~  awk '{printf "%s" (NR%2==0?RS:FS),$1}' file.txt
1 one
2 two
3 tree
 ~ 

Answer 2

If the data format is completely like this: numbers alternate with lines, then I would try replacing with regular expressions. I would output the data to a text file, and then process it with sed.
I would search for lines starting with a digit like ^(\d.+)\n
And remove the newline at the end, i.e. I would change it to \1
After the unit there is a space. Works in Notepad++.