Math.ceil() in JavaScript

JavaScript provides the Math.ceil() method which rounds up the given number to the nearest integer greater than or equal to the given number.

Syntax

The syntax for Math.ceil() method is:

Math.ceil(x)

Where x is the number to round up.

Examples

console.log(Math.ceil(1.4));    // 2
console.log(Math.ceil(4.7));    // 5
console.log(Math.ceil(-1.4));   // -1
console.log(Math.ceil(-4.7));   // -4

In the first example, Math.ceil(1.4) returns 2 because the nearest integer greater than or equal to 1.4 is 2. Similarly, in the second example Math.ceil(4.7) returns 5.

In the third example, Math.ceil(-1.4) returns -1 because the nearest integer greater than or equal to -1.4 is -1. Similarly, in the fourth example, Math.ceil(-4.7) returns -4.

Common Use Cases

Math.ceil() method is commonly used in the following scenarios:

1. To round up a decimal up to the nearest integer.

2. To calculate the number of pages needed to display a given number of items.

3. To calculate the smallest integer greater than or equal to a given number.

Conclusion

Math.ceil() method is a useful method to round up a given number to the next integer. It is commonly used in mathematical calculations and is a part of the global JavaScript Math object.