I have tried the code below but it's output is not proper!
for(i=5;i>=1;i--) {_x000D_
for(j=i;j>=1;j--){_x000D_
console.log(j);_x000D_
}_x000D_
console.log("\n");_x000D_
}This question is related to
javascript
for-loop
for (var line = "#"; line.length < 8; line += "#")
console.log(line);
<html>_x000D_
_x000D_
<head>_x000D_
<script type="text/javascript">_x000D_
var i,j;_x000D_
for(i=1; i <= 5; i++)_x000D_
{_x000D_
for(j=1; j<=i; j++)_x000D_
{_x000D_
_x000D_
document.write('*');_x000D_
}_x000D_
document.write('<br />');_x000D_
}_x000D_
_x000D_
</script>_x000D_
</head>_x000D_
<body>_x000D_
</body>_x000D_
</html>Try this. Maybe it will work for you:
<html>
<head>
<script type="text/javascript">
var i, j;
//outer loop
for(i = 0;i < 5; i++){
//inner loop
for(j = 0;j <= i; j++){
document.write('*');
}
document.write('<br/>');
}
</script>
</head>
<body>
</body>
</html>
for (let i = 1; i <= 5; i++) {_x000D_
for (let j = 1; j <= i; j++) {_x000D_
document.write('*');_x000D_
}_x000D_
document.write('<br />');_x000D_
}for (var i = 7; i >= 1; i--) {_x000D_
var str = "";_x000D_
for (var j = i; j <= 7; j++) {_x000D_
str += "*";_x000D_
}_x000D_
console.log(str);_x000D_
}_x000D_
// This is example_x000D_
_x000D_
// You can do this with any string and without using the function. <html>
<head>
<script>
//Declare Variable
var i, j;
//outer loop
for(i = 0; i <= 25; i++){
//inner loop
for(j = 0; j <= i; j++){
document.write("*");
}
document.write('<br>');
}
</script>
</head>
<body>
</body>
</html>
<!-- end snippet -->
the log will output to a new line every time it is called, in chrome if it's the same it will just keep a count (not sure about other browsers). You want to collect the number of stars per line then output that after the inner loop has run
for (var i = 5; i >= 1; i--) {_x000D_
var ouput = "";_x000D_
for (var j = i; j >= 1; j--) {_x000D_
ouput += "*"_x000D_
}_x000D_
console.log(ouput);_x000D_
}<head>
<style>
p{text-align:center;margin-left:20px;}
</style>
</head>
<body>
<h1>JavaScript patterns</h1>
<p id="demo"></p>
<script>
var x=function(n){
document.write("<center>");
var c="";
for(var i=0; i<n; i++){
c=c+"#";
document.write(c);
document.write("<br>");
}
for(var k=n;k>0;k--){
for(var j=0; j<(k-1); j++){
document.write("#");
}
document.write("<br>");
}
}
document.getElementById("demo").innerHTML = x(10);
</script>
function pyramid(n) {
for(i=1 ;i<=n;i++) {
let str = ' '.repeat(n-i);
let str2 = '*'.repeat(i*2-1);
console.log(str + str2 + str);
}
}
pyramid(5)
This below code worked for me
for(i= 0; i< n; i++){
col = i;
for(j = 0; j< n- col;j++){
process.stdout.write('');
}
for (j = 1;j< col+2;j ++){
process.stdout.write('#');
}
process.stdout.write('\n');
}
/** --------------_x000D_
_x000D_
*_x000D_
**_x000D_
***_x000D_
****_x000D_
*****_x000D_
******_x000D_
*******_x000D_
********_x000D_
*********_x000D_
_x000D_
_x000D_
----------------*/_x000D_
_x000D_
let y = 10;_x000D_
let x = 10;_x000D_
_x000D_
let str = "";_x000D_
_x000D_
for(let i = 1; i < y; i++ ){_x000D_
for(let j = 1; j < x; j++){_x000D_
if(i + j >= y){_x000D_
str = str.concat("*");_x000D_
}else{_x000D_
str = str.concat(" ")_x000D_
}_x000D_
}_x000D_
str = str.concat("\n")_x000D_
}_x000D_
_x000D_
console.log(str)_x000D_
_x000D_
_x000D_
/**________________________x000D_
_x000D_
_x000D_
_x000D_
*********_x000D_
********_x000D_
*******_x000D_
******_x000D_
*****_x000D_
****_x000D_
***_x000D_
**_x000D_
*_x000D_
_x000D_
_x000D_
_______________________*/_x000D_
_x000D_
let str2 = "";_x000D_
_x000D_
for(let i = 1; i < y; i++ ){_x000D_
for(let j = 1; j < x; j++){_x000D_
if(i <= j ){_x000D_
str2 = str2.concat("*");_x000D_
}else{_x000D_
str2 = str2.concat(" ")_x000D_
}_x000D_
}_x000D_
str2 = str2.concat("\n")_x000D_
}_x000D_
_x000D_
console.log(str2)_x000D_
_x000D_
_x000D_
/**----------------------_x000D_
_x000D_
_x000D_
*_x000D_
**_x000D_
***_x000D_
****_x000D_
*****_x000D_
******_x000D_
*******_x000D_
********_x000D_
_x000D_
_x000D_
-------------------------*/_x000D_
_x000D_
_x000D_
let str3 = "";_x000D_
_x000D_
for(let i = 1; i < y; i++ ){_x000D_
for(let j = 1; j < x; j++){_x000D_
if(i >= j ){_x000D_
str3 = str3.concat("*");_x000D_
}_x000D_
}_x000D_
str3 = str3.concat("\n")_x000D_
}_x000D_
_x000D_
console.log(str3)_x000D_
_x000D_
/**-------------------------_x000D_
_x000D_
_x000D_
*********_x000D_
********_x000D_
*******_x000D_
******_x000D_
*****_x000D_
****_x000D_
***_x000D_
**_x000D_
*_x000D_
_x000D_
---------------------------*/_x000D_
let str4 = "";_x000D_
_x000D_
for(let i = 1; i < y; i++ ){_x000D_
for(let j = 1; j < x; j++){_x000D_
if( j >= i ){_x000D_
str4 = str4.concat("*");_x000D_
}_x000D_
}_x000D_
str4 = str4.concat("\n")_x000D_
}_x000D_
_x000D_
console.log(str4)_x000D_
_x000D_
/**--------------------_x000D_
Diamond of Asterisks_x000D_
_x000D_
*_x000D_
***_x000D_
*****_x000D_
*******_x000D_
*********_x000D_
*******_x000D_
*****_x000D_
***_x000D_
*_x000D_
_x000D_
_x000D_
---------------------*/_x000D_
_x000D_
let str5 = "";_x000D_
_x000D_
for(let i = 1; i < y; i++ ){_x000D_
for(let j = 1; j < x; j++){_x000D_
if(i <= y / 2 && j >= (y / 2) - (i - 1) && j <= (y / 2) + (i - 1) ){_x000D_
str5 = str5.concat("*");_x000D_
}else if(i >= y / 2_x000D_
&& j > ((y / 2) - i) * (-1)_x000D_
&& j < (y - ((y / 2) - i) * (-1))){_x000D_
str5 = str5.concat("*");_x000D_
}_x000D_
else {_x000D_
str5 = str5.concat(" ");_x000D_
}_x000D_
}_x000D_
str5 = str5.concat("\n");_x000D_
}_x000D_
_x000D_
console.log(str5)Here is the solution in javascript while loop:
> var i = 0, out = '';
> while( i <= 4)
> {
> out = out + '* ';
> document.write('<br> '+ out);
> i++;
> }
>
> document.write('<br>');
for(i=0;i<=5;i++)_x000D_
{_x000D_
for(j=0;j<=i;j++)_x000D_
{_x000D_
document.write('*');_x000D_
}_x000D_
document.write('<br>')_x000D_
}You can try this
var x, y, space = "",
star = "",
n = 4,
m = n - 1;
for (x = 1; x <= n; x++) {
for (y = m; y >= 1; y--) {
space = space + (" ");
}
m--;
for (let k = 1; k <= x * 2 - 1; k++) {
star = star + "*"
}
console.log(space + star)
space = '';
star = "";
}
It's very simple, Try this code as below:
for(var i = 1; i <= 5; i++) {
for(var j = 1; j<= i; j++) {
document.write("*");
}
document.write("<br/>");
}
for(var a=1;a<8;a++){
var o="";
for(var b=1;b<=a;b++){
o +="#";
}
debug(o);
}
Try above code.
Output:
--> #
--> ##
--> ###
--> ####
--> #####
--> ######
Just try it out
**Your Pyramid will be downwards like: **
4 3 2 1
3 2 1
2 1
1
function stars(n){
var str = '';
for(var i=n; i>=1; i--){
for(var k=n; k>=i; k--){
str += "\t";
}
for(var j=i; j>=1; j--){
str += j+"\t\t";
}
console.log(str);
str = "";
}
}
stars(3);
Your Pyramid will be upwards like :
*
* *
* * *
function stars(n){
var str = '';
for(var i=1; i<=n; i++){
for(var k=1; k<=n-i; k++){
str += "\t";
}
for(var j=1; j<=i; j++){
str += "*\t\t";
}
console.log(str);
str = "";
}
}
stars(3);
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<p id="test"></p>
</body>
<script>
//Declare Variable
var i;
for(i = 0; i <= 5; i++){
document.write('*'.repeat(i).concat("<br>"))
}
</script>
</html>
<!DOCTYPE html>
<html>
<head>
<script>
//Declare Variable
var i,j;
//First Way
for(i = 5; i >= 0; i--){
for(j = 0; j <= i; j++){
document.write('*');
}
document.write('<br>');
}
//Second Way
for(i = 5; i >= 0; i--){
document.write('*'.repeat(i).concat('<br>'))
}
</script>
</head>
<body>
</body>
</html>
for(var i=1; i<=4; i++){
console.log("*".repeat(i));
}
/*
Output is:
"*"
"**"
"***"
"****"
*/
As I understand from your code, you are actually trying to print stair pattern rather than star.
Your main error consists in that console.log function prints every time on the next line.
for (var i = 5; i >= 1; i--) {
var str = "";
for (var j = i; j >= 1; j--) str += j;
console.log(str);
}
JSFiddle for you: http://jsfiddle.net/99wL8cbt/2/
This is the simplest solution which I came across using only one for loop.
var a = '';
var n = 5;
var m = (n-1);
for(i=1; i <= n; i++)
{
a = a.trim();
a = ' '.repeat(m) + a + (i > 1 ? ' ' : '') + '*';
console.log(a);
m--;
}
Output:
/**------------------------
*
* *
* * *
* * * *
* * * * *
---------------------------*/
Source: Stackoverflow.com