I want to create a multiple pyramid program using Javascript but I really don't understand from where should I start to create multiple star pyramid program.
Note: I have to create this using For Loop.
Output I want:
* *
* * * *
* * * * * *
Here is my Code:
for(i=1;i<=3;i++){
for(j=1;j<=i;j++){
document.write("*"+ " ")
}
for(k=5;k>=1;k=k-2){
for(m=1;m<=k;m++){
document.write("*")
}
}
document.write("<br>")
}
The following code would draw a double pyramid of N levels, using underscores (_) to depict spaces. You may modify the characters used.
const drawPyramid = length => {
for (let i = 0; i < length; i++) {
const N = 2*(length - i - 1)
, blankValues = [...Array(N+1).keys()].slice(1).map(n => n + i)
for (let j = 0; j < 2 * length; j++) {
if (!blankValues.includes(j)) document.write("* ")
else document.write("_ ")
}
document.write("<br>")
}
}
drawPyramid(3)
document.write("<br>")
drawPyramid(4)
document.write("<br>")
drawPyramid(10)Try the following:
var allowedIndexes = [];
const columnNum = 6
for(var i=0; i<3 ;i++){
allowedIndexes.push(i)
allowedIndexes.push(columnNum - (i+1))
for(var j=0;j< columnNum ;j++){
if(allowedIndexes.includes(j)){
document.write("* ")
}
else {
document.write(" ")
}
}
document.write("<br>")
}
const writePyramid = (levels, row = 0, level = [], spacers = 0) => {
if (row === levels) return;
document.write("<br>")
if (spacers === 0) spacers = levels + 1;
let stars = new Array(row + 1).fill('*')
level = [...stars, ...new Array(spacers > 1 ? spacers : 0).fill(' '), ...stars]
document.write(level.join(''))
writePyramid(levels, row + 1, level, spacers / 2);
}
writePyramid(3)