Random number generation without duplication in R

I am trying to generate 29 random numbers between 01 and 99 with out duplication. The code I have come up with is -

*as.integer((sample(runif(40,0,1), size=29, replace = F, prob = NULL))100))

Basically I have tried generating 40 samples from uniform distribution and then taken 29 samples from them. I multiplied it by 100 then took the integer values.

Any help would be appreciated.