# JavaScript: Check if a given number is a power of 10

## JavaScript Math: Exercise-54 with Solution

Write a JavaScript program to check if a given number is a power of 10.

Math.log10() and the modulo operator (%) determines if num is a power of 10.

**Sample Solution:**

**JavaScript Code:**

```
// Define an arrow function named is_Power_Of_Ten that checks if a number is a power of ten.
const is_Power_Of_Ten = num => Math.log10(num) % 1 === 0;
// Check if various numbers are powers of ten and output the result.
console.log(is_Power_Of_Ten(1));
console.log(is_Power_Of_Ten(10));
console.log(is_Power_Of_Ten(30));
console.log(is_Power_Of_Ten(100));
console.log(is_Power_Of_Ten(90));
console.log(is_Power_Of_Ten(1000));
```

Output:

true true false true false true

**Flowchart: **

**Live Demo: **

See the Pen javascript-math-exercise-54 by w3resource (@w3resource) on CodePen.

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