Display exact value of a variable in R

Question

> x <- 1.00042589212565
> x
[1] 1.000426

If I wanted to print the exact value of x, how would I do it?

Sorry if this is a dumb question. I tried Googling for "R" and "exact" or "round" but all I get are articles about how to round.

Thank you in advance!

Answer 1

Globally solution during all the session

options(digits=16)
> x
[1] 1.00042589212565

or locally just for x:

sprintf("%.16f", x)
[1] "1.0004258921256499"

Answer 2

print(x, digits=15)

or

format(x, digits=15)

or

sprintf("%.14f", x)