Java Math ceil example

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Java math ceil function is used to get smallest integer which is greater than number.

Real life example

Let’s say a telephone company charges you 1 dollar per minute. When you talk to someone for 1 minute 5 seconds, it will still charge you 2 dollar for that call. So telephone company can use Math.ceil function to get 2 minutes from 1 minutes 5 seconds.

Syntax

Example

Let’s use math’s ceil function in the example.

When you run above program, output of the program will be:

Ceil value for 2.6 = 3.0
Ceil value for 26.1 = 27.0
Ceil value for -0.8 = -0.0
Ceil value for -6.2 = -6.0
Ceil value for 4.6f = 5.0

Few points about Math.ceil function:

  • In case of Nan or infinity or zero, it will give you same result as argument.
  • If you pass a value which is already equal to integer, it will result in same value.

That’s all about Java math ceil function.

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