If in Vim I type
CTRL-K followed by
S, I can get a superscript such as
How though do I write something like 10 to the power of 18?
I ask this on the assumption that there must or ought to be a way of specifying a multi-digit exponent, because when I try typing one after the other, they came out with little gaps between them, to make it appear as though they were not quite the same exponent.
So if I try to write 10 to the power of 18 by typing
S, I do get 10 followed by a superscript 1 and 8, but the 1 and 8 appear as 1 8 instead of 18.
The font seems to make a difference. In Gedit, at least, by using the Linux desktops invocation of superscript chars -- typing CTRL-shift-U B 9 CTRL-shift-U 2078 gets a superscript of 1 8 when my font is monospace, but 18 when my font is, say Navilu normal. If however I set my font to Nakula Regular, I get 18, but the 1 is dropped slightly, so it looks out of kilter with the 8.
The same thing happens in Vim. All the fonts render the 1, 2 and 3 differently in comparison to exponents of other numbers, sometimes with markedly different sizes, and usually with the 1,2 and 3 dropped.
Indeed, the same thing seems to happen in Stack Overflow: ¹⁸⁹⁴²³⁰.