Round up / Rround down

Hi Guys

probably an easy one here
I need to round cell values up of over .5 or down if under and if .5 round up so say 3.67 to 4 and 3.64 to 3 etc

Im sure its easy.

=round(a1,0)

round down is from 0 and roundup is towards 0

3.67 =+ROUNDUP(A1,0) increases value towards next whole digit or near whole digit
3.67 =+ROUNDDOWN(A2,0) decreases value towards next whole digit or near whole digit