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I'm a newbie in JavaScript, can someone explain to me why I'm getting NaN as output from this code?
var car = new Array("Honda", "Toyota", "BMW", "Merc");
var calc = 3 * car.legth;
alert(calc);
You should do 3 * car.length; as car is an array and it has length property to return the number of elements in the array.
var car = new Array("Honda", "Toyota", "BMW", "Merc");
var calc = 3 * car.length;
alert(calc);
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var legalCharactersForSaveCode = ["B","C","D","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z", "+", "/",];
var saveCode = [];
function generateSaveCode() {
for(var c = 0; c > 30; c++){
v = Math.round(Math.random() * legalCharactersForSaveCode.length);
saveCode.push(legalCharactersForSaveCode[v]);
}
saveCode.push(store.get("money"));
alert(saveCode);
}
I'm trying to make it so it pushes a random character.
When I ask it to alert the saveCode array all it does is alert the money.
(I'm using store.js)
I was expecting for it to push a random characters from the legalCharacters array into the saveCode array.
Your "for" loop does not work as the condition is c > 30, and should be c < 30
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This is my code but when i run this code in console always giving me Congratulations.
Help me for solve this problem.
var val=Math.floor(Math.random() * 10) + 1;
console.log(val);
var Predict = Number(prompt("Prediction ?"));
for(var i=1 ; i <= 3; i++){
if(Predict<val){console.log("Up")};
if(Predict=val){console.log("Congratulations") };
if(Predict>val){console.log("Down")}
}
Equal operator assigns the right hand to the left hand and so the result is always true! To compare two values use double equals like this:
if (Predict==val){console.log("Congratulations") };
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Closed 6 years ago.
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Below is my code, for some reason it outputs undefined for ['6'] & ['7'], all the other ones work. I don't understand what is going wrong.
var array = [
['1'],
['2'],
['3'],
['4'],
['5'],
['6']
['7'],
['8'],
['9'],
['10']
];
if(document.getElementById("random-element")) {
var rand = array[Math.floor(Math.random() * array.length)];
document.getElementById('random-element').innerHTML = rand;
}
https://jsfiddle.net/ggky7a03/
You missed a comma in your array, which will explain why those 2 values are not returning (they don't exist)
Side note, array is a reserved word in JS, so you can't (shouldn't) use it for your variable name, so change it to
var myAwesomeArray = [
// or similar
Here's your fixed code
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I'm creating a site and i needed to do some js. I'm not that good with it but tought i would figer it out. Not. I created a for loop but it does not run.
function order(user,product){
var index;
for(var i = 0; i<users.lenght; i++){
if(user == users[i]){
index = i;
break;
}
}
var budget = budgets[index];
alert(budget);
}
the creation of the users and budgets arrays are done with php and after checking with alert() it was how it should be.
Can anyone help me please?
lenght is spelt length. The misspelt property does not exist, so it undefined, which is equivalent to 0.
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Closed 8 years ago.
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I want to use the value of a variable inside a array, like this.
var advalue = Math.floor(Math.random * 6);
var ads = ["Hello", "World", "Randomword", "123", "1233", "0000"];
API.sendChat("Word: " + ads[advalue]);
When i run this, i get undefined
There is a typo, missing brackets after random
var advalue = Math.floor(Math.random() * 6);