Extracting the complete decimal part of the number in R

There are multiple ways to solve and extract the decimal part some are: lets store the result in dec

1. dec <- my_num - floor(my_num)
2. dec <- my_num%%1
3. dec <- my_num - as.integer(my_num)
4. dec <- my_num - trunc(my_num)

all these will result the same.