Force R not to use exponential notation (e.g. e+10)?

To turn off scientific notation in r, you have to disable the scientific notations in R using the scipen option from the options function, which does the following

Scipen:- A penalty to be applied when deciding to print numeric values in fixed or augmented notation. Positive values slant towards fixed and negative towards scientific notation: fixed notation will be preferred unless it is more than scipen digits wider.

However, to disable exponential format/scientific notations:

    options(scipen=999)

For example:

 num <- c(2.21e+09, 7)options("scipen"=100, "digits"=4) 
num
[1] 2210000000          7

Note: This will disable the scientific notation in the global setting.

And To so for a particular function, use the following code:

    format(functionResult, scientific=FALSE)