What's wrong here!? Topic if.?

Question

JavaScript

Hello, I'm new to learning JS, so I'm asking for your help...
Explain to me what's wrong here. I already didn’t mock this script, it doesn’t work, it doesn’t want to work - it writes - "You were born in undefinedNaN months from your birthday, until the end of the year." Help....
alert("Task: Enter the month you were born in (number)")
var mount = prompt("Month is ", '');
var mounts
if (mount == 1){
mount=("January");
}
else if (mount == 2){
mount=("February");
}
else if (mount == 3){
mount=("March");
}
else if (mount == 4){
mount=("April");
}
else if (mount == 6){
mount=("June");
}
else if (mount == 7){
mount=("July");
}
alert("You were born in "+ mounts + (12 - mount) + " months from your birthday, until the end of the year.")

Answer 1

1) replace with you get the string written in mount, after entering the value you need to convert it from the string to a number, you can do it simply by putting + 2) perform strict checks through === 3) mount = ("January") you overwrite the desired string number, apparently the error needs mounts