Java Math.ceil: Rounding Up Numbers

In Java, Math.ceil() is a mathematical function that returns the smallest integer greater than or equal to the specified double value. In other words, Math.ceil() rounds up the parameter to the nearest integer that is greater than the parameter value.

For example, if you input Math.ceil(3.14), the function will return 4.0 because the closest and greater integer to 3.14 after rounding up is 4. Similarly, if you input Math.ceil(-3.14), the function will return -3.0 because the closest and greater integer to -3.14 after rounding up is -3.

Using the Math.ceil() function ensures that a decimal number is rounded up to the nearest whole number, regardless of how small the decimal part may be. This is very useful in certain mathematical calculations and data processing scenarios.