do {
var y = prompt("Enter a positive integer from 1 to 26");
var int = Number.isInteger(y);
var x = parseInt(y);
window.alert(int);
} while (x > 26 || x < 1 || int == false)
this is the code I wrote but it still keeps alerting int as false whenever I enter an integer on my browser.
Number.isInteger() is used to tell if a value that's already a number is an integer.
I.e.
Number.isInteger(5) == true
Number.isInteger(5.1) == false
Passing a string into Number.isInteger() will always return false.
Because prompt() always returns a string. It is up to you to make it integer:
let y = prompt("Enter a positive integer from 1 to 26");
y = parseInt(y);
if (y === NaN) {
alert('Please enter a number');
} else {
while(x > 26 || x < 1 || int == false)
}