JavaScript Math.log10()

// calculate the base 10 log of 100
var value = Math.log10(100);

console.log(value); 

// Output: 2

log10() Syntax

The syntax of log10() is:

Math.log10(x)

Here, log10() is a static method. Hence, we need to access the method using the class name, Math.

log10() Parameter

The log10() method takes in:

• x - a number

log10() Return Values

The log10() method returns:

• the base 10 logarithm of the given number.
• NaN for negative numbers and non-numeric arguments.

Example 1: JavaScript Math.log10()

// find the base 10 log value of 1
var value1 = Math.log10(1);

console.log(value1); 

// find the base 10 log value of 10
var value2=Math.log10(10);

console.log(value2)

Output

0
1

In the above example,

• Math.log10(1) - computes the base 10 log value of 1
• Math.log10(10) - computes the base 10 log value of 10

Example 2: log10() With 0

// find the base 10 log value of 0
var value = Math.log10(0);

console.log(value);

// Output: -Infinity

In the above example, we have used the log10() method to compute the base 10 log value of 0.

The output -Infinity indicates that the base 10 log value of 0 is negative infinity.

Example 3: log10() With Negative Values

// find the base 10 log of negative values
var value = Math.log10(-1);

console.log(value); 

// Output: NaN

In the above example, we have used the log10() method to compute the base 10 log value of a negative number.

The output NaN stands for Not a Number. We get this result because the base 10 log value of negative numbers is undefined.

Recommended Readings:

• Math.log()
• Math.log2()