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I created a pyramid using JavaScript and below is the code that I tried so far using for loop:
function showPyramid() {
var rows = 5;
var output = '';
for (var i = 1; i <= rows; i++) { //Outer loop
for (var j = 1; j <= i; j++) { //Inner loop
output += '* ';
}
console.log(output);
document.getElementById('result').innerHTML = output;
output = '';
}
}
Pretty basic! But I am trying to bind the result with HTML element, say with div as follows:
document.getElementById('result').innerHTML = output;
Instead it shows five stars in a row rather than the format in JS seeing in the console. Anything that I am missing here?
Full Code:
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Pyramid</title>
<script>
function showPyramid() {
var rows = 5;
var output = '';
for (var i = 1; i <= rows; i++) {
for (var j = 1; j <= i; j++) {
output += '* ';
}
console.log(output);
document.getElementById('result').innerHTML = output;
output = '';
}
}
</script>
</head>
<body onload="showPyramid();">
<h1>Pyramid</h1>
<div id="result"></div>
</body>
604
Currently, you are resetting the innerHTML at the end of each loop iteration; either use += to append HTML or append all the output together first, then set the innerHTML. Also, you will need to use the <br> tag to create line breaks in HTML.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Pyramid</title>
<script>
function showPyramid() {
var rows = 5;
var output = '';
for (var i = 1; i <= rows; i++) {
for (var j = 1; j <= i; j++) {
output += '* ';
}
output += "<br/>";
}
document.getElementById('result').innerHTML += output;
}
</script>
</head>
<body onload="showPyramid();">
<h1>Pyramid</h1>
<div id = "result"></div>
</body>
</html>
const result = document.querySelector("#result");
function generatePyramid(max = 5) {
result.innerHTML = "";
const length = 2 * max - 1;
for (let i = 1; i <= max; i++) {
let s = "*".repeat(i).split("").join(" ");
s = s.padStart(
s.length + Math.floor((length - s.length) / 2)
).padEnd(length);
const div = document.createElement("div");
div.innerHTML = s.replace(/\s/g, " ");
result.appendChild(div);
}
}
// generatePyramid(); // base 5 stars
generatePyramid(11); // base 11 stars
// generatePyramid(21); // base 21 stars<h1>Pyramid</h1>
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