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

JavaScript Math: Exercise-54 with Solution

Check Power of 10

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.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that checks if a number is an exact power of 10 by continuously dividing by 10.
• Write a JavaScript function that converts a number to a string and verifies it starts with '1' followed by only zeros.
• Write a JavaScript function that uses logarithms to determine if the base-10 logarithm of a number is an integer.
• Write a JavaScript function that handles edge cases such as zero or negative numbers when testing for power of 10.

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