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ViewsTotal up even number from 1 to A number that user enter using JavaScript and HTML
How can I display even number from the user input? My code does not reply anything.
<!DOCTYPE html>
<html>
<head>
<script>
var num;
var count = 0;
var result;
num = Number(prompt("Enter the maksimum number: ", ""));
document.write("Sum of all even number from 1 to " + num);
for (int i = 0; i < num; i += 2) {
sum += i;
}
document.write(sum);
</script>
</head>
<body>
</body>
</html>
·
Juan Pablo Isaza
2 answers
Answer question0
JS does not have an int type for your loop to work in, if you change that to let and change count to sum to initialise it it works:
<!DOCTYPE html>
<html>
<head>
<script>
var num;
var sum = 0;
var result;
num = Number(prompt("Enter the maksimum number: ", ""));
document.write("Sum of all even number from 1 to " + num);
for (let i = 0; i < num; i += 2) {
sum += i;
}
document.write(sum);
</script>
</head>
<body>
</body>
</html>
·
Juan Pablo Isaza
Report
0
- You cannot declare a variable using
int. Useletorconstinstead. - You need to declare and initialize the variable
sum.
var num;
num = Number(prompt("Enter the maksimum number: ", ""));
document.write("Sum of all even number from 1 to " + num + ": ");
let sum = 0;
for (let i = 0; i < num; i += 2) {
sum += i;
}
document.write(sum);
·
Juan Pablo Isaza
Report
Answer question