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I am trying to improve my ability to create efficient algorithms everyday and I am facing an issue with this one... I want to create a JavaScript function loop to write only odd numbers between 0 and 15000:
function Nowork() {
for(x = 1; x < 15001; x+2) {
document.write(x);
}
}
Nowork();
This one doesn't work (also I know document.write should be written only for testing and debugging), instead I know that one works but it only write the even numbers:
function Works() {
for(x = 1; x < 15001; x++) {
document.write(x);
}
}
Works();
Does anyone have an idea how to do that and also explain to me why my first function doesn't work?
use this:
function Nowork() {
for(x = 1; x < 15001; x=x+2) {
document.write(x);
}
}
Nowork();
you cant use +2 like that.
Related
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I want to make a function that forms an array based on the user input so I write the javascript as below but it only returns a fatal error. What is wrong with this code? I try to match with the book's code but I don't find anything particularly different so I came to the StackOverflow. The code is as follows
function arrayForm(start, limit)
{
let array = [];
for (start <= limit; start++;)
{
array.push(start);
}
return array;
}
console.log(arrayForm(1,10));
try
{
let array = [];
for (let i = start; i <= limit; i++)
{
array.push(i);
}
return array;
}
console.log(arrayForm(1,10));
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Closed 2 years ago.
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I'm new to constructors - I'm trying to use one to create a customizable object, with this sort of code:
class test{
constructor(range) {
var start;
if(range==="a"){
start = 56;
}
else if(range==="b"){
start = 53;
}
for(var i=start; i<(start+5); i++); {
console.log(i);
//construct an array here
}
}
}
const myTest = new test("a");
But only the last loop seems to execute!
The log shows just the value 61.
You have an semicolon to early. The result is an empty statement and an additional block statement outside of the loop.
Finally you get the last value of i.
for (var i = start; i < (start + 5); i++); {
// ^
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Closed 6 years ago.
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function main (str, d){
var myStr = str.split(d);
for(var x=0; x<myStr.lenght; x++){
console.log(myStr[x]);
}
}
console.log(main('one-two-three-four-five','-'));
It should print : one two three four five on different lines but it doesn`t.Can u guys help me with this problem? Thank you!
Use Array#length for the length of an array.
function main (str, d){
var myStr = str.split(d);
for (var x = 0; x < myStr.length; x++) {
// ^^^^^^
console.log(myStr[x]);
}
}
console.log(main('one-two-three-four-five', '-')); // this returns undefined at the end of the console
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This is happening on an angular application I'm building. If a user enters 80 into an HTML input, it always seems to get this comparison wrong.
var x = '80';
var y = 150.9800;
/* Returns incorrect answer */
if (parceFloat(x) < y) {
return true;
} else {
return false;
}
You need to use ParseFloat() not parceFloat() ...
parceFloat is not an existing function.
parceFloat() is not a function, the function is parseFloat()
A simple typo is all the error there is.
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I have a function in javascript as so :
function player(){
var cards=[];
this.score=0;
var self=this;
this.addCard=addCard;
this.resetCards=resetCards;
function addCard(card){
cards.push(card);
this.score=+card.value;
}
function resetCards(){
cards=[];
score=0;
}
}
I user a constructor to call the function :
var player1=new player();
Then I call some of its enclosed functions like this
player1.addCard(someCardObject);//card someCardObject has .value say 5
player1.addCard(someCardObject);//card someCardObject has .value say 7
I expect player1.score to be 5+7=12 ,but it stays 7 .
Can anyone tell me what I am doing wrong here
You've got a simple error in addCard.
this.score=+card.value;
Should be
this.score += card.value;
In the first instance, you're setting this.score equal to card.value, while in the second one, you're adding card.value to it. Remember kids, order of operators matters!