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I need to create a bit of code for javascript which I can have random numbers...

I need to create a bit of code for javascript which I can have random numbers generate with a certain amount of digits set by the user. and ask the user how many times they want this to happen.
For example The user says they want a number with 4 digits (any number between 0 - 9999) and the user can input if they want to add, subtract, multiply, divide, or make it random
2 random numbers are generated. First number 1451 and the next number is 58.
If the user selects "random" the program will pick between the 4 (add multiple subtract divide)
Once the numbers are made 1451 & 58 the user then needs to "add" (random pick) and the profram lets them know if they did it correct or not.

Say the player select they want to do this 3 times. it just repeats the process above.
Additionally would it be possible to record the results?

engineering   Computer-Science   
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Homework Answers

Answer #1

Code -

<!DOCTYPE html>

<html>

<title>Web Page Design</title>

<head>

<script>

var output,num1,num2,operator;

function myFunction() {

var digitCount = parseInt(document.getElementById("digit").value);

var numberRange = Math.pow(10, digitCount)

num1 = Math.floor(Math.random() * (numberRange - 1));

num2 = Math.floor(Math.random() * (numberRange - 1));

var x = parseInt(document.getElementById("mySelect").value);

var choice;

if (x == 6) {

choice = Math.floor(Math.random() * 4) + 2;

}

else {

choice = parseInt(document.getElementById("mySelect").value);

}

operator = getOperator(choice);

document.getElementById("demo").innerHTML = "First number " + num1 + " Second number " + num2 + " your choice " + operator;


}

function getResult() {

output = parseInt(document.getElementById("output").value);

var result = operation(num1,num2,operator);

if(result==output){

document.getElementById("result").innerHTML = "Correct answer";

}

else{

document.getElementById("result").innerHTML = "Wrong answer";

}

}

function operation(num1,num2,operator){

switch (operator) {

case '+': return num1+num2; break;

case '-': return num1-num2; break;

case '*': return num1*num2; break;

case '/': return num1/num2; break;

}

}

function getOperator(choice) {

switch (choice) {

case 2: return '+'; break;

case 3: return '-'; break;

case 4: return '*'; break;

case 5: return '/'; break;

}

}

</script>

</head>

<body>

Enter the number of digits <input type="text" id="digit"><br>

Select the operation you want to perform<select id="mySelect" onchange="myFunction()">

<option value="1">---Default---</option>

<option value="6">Random</option>

<option value="2">Add</option>

<option value="3">Subtract</option>

<option value="4">Multiply</option>

<option value="5">Divide</option>

</select>

<div id="demo"></div>

Your output : <input type="text" id="output">

<input type="button" value="Submit" onclick="getResult()">

<div id="result"></div>

</body>

</html>

Screenshots -

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