Use parseFloat() to try to convert n to a number. Use !Number.isNaN() to check if num is a number.
Math Related
Generating random numbers with JavaScript
In this snippet, look at how to get a random integer between two numbers.
Check if the given number is even
Check whether a number is odd or even using the modulo (%) operator. Return true if the number is even, false if the number is odd.
Check if the given number is odd
Check whether a number is odd or even using the modulo (%) operator. Return true if the number is odd, false if the number is even.
Calculate the nth root of a given number
Use Math.pow() to calculate x to the power of 1/n which is equal to the nth root of x.
Convert a value to a safe integer
Use Math.max() and Math.min() to find the closest safe value. Use Math.round() to convert to an integer.
Distance Speed Time
Calculate the time, distance, or speed given any two of the pieces of information. Convenient!
Amazing Quadratic Equation Solver
This script will factor and solve for both values of X, any quadratic equation that has real number solutions.
Roman Numeral Converter 2
This script will convert whole numbers to Roman numerals, up to 3,999,999. Easy to use.
Metric BMI Calculator
Use this script to calculate your BMI (Body Mass Index). Measurements are computed using the metric system. A perfect addition for a health Web site.