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### 1. length Property of String Representation

To get the length of a number, call the `toString()`

method on the number to convert it to a string, then access the `length`

property of the string, i.e., `num.toString().length`

.

```
const num1 = 12345;
const num2 = 524;
console.log(num1.toString().length); // 5
console.log(num2.toString().length); // 3
```

We call the `toString()`

method on the number to get its string representation.

```
const num1 = 12345;
const num2 = 524;
console.log(num1.toString()); // '12345'
console.log(num2.toString()); // '524'
```

`String`

objects have a length property that returns the number of characters (UTF-16 code units) in a string. We use this to get the length of the number.

#### Getting the Length of Floats

For floating point numbers, the decimal point will be included when accessing the `length`

property of the string representation of the float.

```
const float1 = 123.45; // 5 digits
const float2 = 524.1; // 4 digits
console.log(float1.toString().length); // 6
console.log(float2.toString().length); // 5
```

To avoid this and get the actual number of digits in the float, simply subtract 1 from `length`

.

```
const float1 = 123.45; // 5 digits
const float2 = 524.1; // 4 digits
console.log(float1.toString().length - 1); // 5
console.log(float2.toString().length - 1); // 4
```

### 2. Math.ceil() and Math.log10() Methods

We can also use a purely mathematical approach to get the length of a number:

```
function getNumberLength(num) {
return Math.ceil(Math.log10(num + 1));
}
const num1 = 12345;
const num2 = 524;
console.log(getNumberLength(num1)); // 5
console.log(getNumberLength(num2)); // 3
```

The `Math.log10()`

method returns the logarithm of a number to the base 10.

`console.log(Math.log10(12345)); // 4.091491094267951`

And the `Math.ceil()`

method rounds a number up to the next largest integer.

```
console.log(Math.ceil(4.091491094267951)); // 5
```

Unfortunately, this method doesn’t work for floats. It only returns the number of digits before the decimal point.

```
function getNumberLength(num) {
return Math.ceil(Math.log10(num + 1));
}
const float1 = 123.45; // 5 digits
const float2 = 524.1; // 4 digits
console.log(getNumberLength(float1)); // 3
console.log(getNumberLength(float2)); // 3
```

## 11 Amazing New JavaScript Features in ES13

This guide will bring you up to speed with all the latest features added in ECMAScript 13. These powerful new features will modernize your JavaScript with shorter and more expressive code.