# JavaScript | Math.log10() function

The Math.log10() is an inbuilt function in JavaScript which give the value of base 10 logarithms of any number.
Syntax:

`Math.log10(p)`

Parameters:

• Here the parameter p is any number whose base 10 logarithms is to be calculated.
• Return Values:

• It returns the value of base 10 logarithms of any number.
• Examples:

```Input:
Math.log10(5)
Output:
0.6989700043360189
```

Explanation:
Here value of base 10 logarithms of number 5 is 0.6989700043360189 as shown output.

```Input:
Math.log10(10)
Output:
1
```

Let’s see some JavaScript code on this function:

 `// Different numbers are being taken ` `// as the parameter of the function. ` `console.log(Math.log10(1000)); ` `console.log(Math.log10(12)); ` `console.log(Math.log10(26)); ` `console.log(Math.log10(5)); `

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Output:

```> 3
> 1.0791812460476249
> 1.414973347970818
> 0.6989700043360189```

Code #2:

 `// Taken parameter from 1 to 19 incremented by 3. ` `for` `(i = 1; i < 20; i += 3) { ` `    ``console.log(Math.log10(i)); ` `} `

Output:

```> 0
> 0.6020599913279624
> 0.8450980400142568
> 1
> 1.1139433523068367
> 1.2041199826559248
> 1.2787536009528289
```

Errors and exceptions:

1. Parameters for this function should always be a number otherwise it return NaN i.e, not a number when its parameter taken as string.

 `// Parameters for this function should always be a ` `// number otherwise it return NaN i.e, not a number ` `// when its parameter taken as string. ` `console.log(Math.log10(``"gfg"``)); `

Output:

```> NaN
```
2. This function gives error when its parameter taken as complex number because it accept only integer value as the parameter.
 `// Parametes can never be a complex number because ` `// it accept only integer value as the parameter. ` `console.log(Math.log10(1 + 2i)); `

Output:

```Error: Invalid or unexpected token
```

Application:

• Whenever we need the value of base 10 logarithms of any number that time we take the help of this function.Its value needed many times in mathematics problem.
Let’s see JavaScript code for this application:
Code #1:

 `// taking parameter as number 14 and calculated in the form of function. ` `function` `value_of_base_10_logarithms_of_any_number() ` `{ ` `    ``return` `Math.log10(14); ` `} ` `console.log(value_of_base_10_logarithms_of_any_number()); `

Output:

`> 1.146128035678238`

This article is attributed to GeeksforGeeks.org

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