math.ceil

math.ceil Function
Syntax math.ceil( num : number )
Returns	number
API	math
Source	Lua (source)

Return num rounded to the next whole integer.

ExampleRound the value of user input
Read a line from the user, then print the ceiling of the number they entered.
Code	print(math.ceil(tonumber(read())))
Output	Depends on what the user wrote. For instance, if they were to enter 0.2, the number printed would be 1.