I made a simple number guessing game in javascript which goes from 1 to 100.
My problem is that everything works, except when I type a decimal number from 100 to 101. I want my code to give me the "Please enter a number from 1 to 100" message then, but it doesn't.
How do I get Javascript to round this properly?
let randomNumber = Math.floor(Math.random() * 100); // Random number
function guess() {
let inp = document.getElementById("number").value; // Reading input
let inpRounded = Math.floor(inp);
// Random number is higher
if (inpRounded < randomNumber && inpRounded >= 1 && inpRounded <= 100) {
document.getElementById("result").innerHTML = "Higher";
}
// Random number is lower
else if (inpRounded > randomNumber && inpRounded >= 1 && inpRounded <= 100) {
document.getElementById("result").innerHTML = "Lower";
// Input matches random number
} else if (inpRounded == randomNumber && inpRounded >= 1 && inpRounded <= 100) {
document.getElementById("result").innerHTML = "You won!";
}
// Input is weird
else if (inpRounded == null) {
document.getElementById("result").innerHTML = "Please enter a valid number";
}
// Input is lower than 1 or higher than 100
else if (inpRounded < 1 || inpRounded > 100) {
document.getElementById("result").innerHTML = "Please enter a number from 1 to 100";
}
// Other issue
else {
document.getElementById("result").innerHTML = "Error"
}
}<h2>Enter a number from 1 to 100</h2>
<input type="number" placeholder="Type your guess here" id="number">
<input type="button" value="Go!" onclick="guess()">
<p id="result"></p>Just put this code first before you check other things.
if (inpRounded == null) {
document.getElementById("result").innerHTML = "Please enter a valid number";
return;
}
if (inpRounded < 1 || inpRounded > 100) {
document.getElementById("result").innerHTML = "Please enter a number from 1 to 100";
return;
}
Don't round the number initially, otherwise you'll lose the decimal information you need when you want to reject values between 100 and 101.
function guess() {
const value = document.getElementById("number").value; // Reading input
const numValue = Number(value);
if (numValue < 1 || numValue > 100) {
document.getElementById("result").textContent = "Please enter a number from 1 to 100";
return;
}
const inpRounded = Math.floor(numValue);
// etc