//Random Decimal between 0 and 1

function randomFraction() {

return Math.random();

}

//Generate Random Whole Numbers with JavaScript

//It's great that we can generate random decimal numbers, but it's even more useful if we use it to generate random whole numbers.

// Use Math.random() to generate a random decimal.

// Multiply that random decimal by 20.

// Use another function, Math.floor() to round the number down to its nearest whole number.

// Remember that Math.random() can never quite return a 1 and, because we're rounding down, it's impossible to actually get 20. This technique will give us a whole number between 0 and 19.

// Putting everything together, this is what our code looks like:

Math.floor(Math.random() * 20);

// We are calling Math.random(), multiplying the result by 20, then passing the value to Math.floor() function to round the value down to the nearest whole number.

// Use this technique to generate and return a random whole number between 0 and 9.

var randomNumberBetween0and19 = Math.floor(Math.random() * 20);

function randomWholeNum() {

return Math.floor(Math.random() * 10 );

}

// Generate Random Whole Numbers within a Range

// Instead of generating a random number between zero and a given number like we did before, we can generate a random number that falls within a range of two specific numbers.

// To do this, we'll define a minimum number min and a maximum number max.

// Here's the formula we'll use. Take a moment to read it and try to understand what this code is doing:

Math.floor(Math.random() * (max - min + 1)) + min

// Create a function called randomRange that takes a range myMin and myMax and returns a random number that's greater than or equal to myMin, and is less than or equal to myMax, inclusive.

//Example

function ourRandomRange(ourMin, ourMax) {

return Math.floor(Math.random() * (ourMax - ourMin + 1)) + ourMin;

}

ourRandomRange(1, 9);

//Example 2

function randomRange(myMin, myMax) {

return Math.floor(Math.Random() * (myMax - myMin +1)) + myMin;

}

var myRandom = randomRange(5, 15);

// Use the parseInt Function

// The parseInt() function parses a string and returns an integer. Here's an example:

var a = parseInt("007");

// The above function converts the string "007" to an integer 7. If the first character in the string can't be converted into a number, then it returns NaN.

function convertToInteger(str) {

return parseInt(str)

}

convertToInteger("56");