Why the code is being executed even the condition is not true?

Question

https://code.sololearn.com/WeQKTq5wO457/?ref=app

var batteryLevel = 10
var batteryLevel = 90
if (batteryLevel = 100){
alert ("Battery is full")
}

Answer 1

because u have assigned 100 to battery value.. and it is not comparing it.. u need to use == operator

Answer 2

Why is that not considered as a condition instead of assigning a new value ?
@Sami Khan

Answer 3

because that was an assignment operator.. This is " ==" the comparison operator

Answer 4

@Sami Khan Thank you!
Now I got it. The assignment operator will assign a value and won't evaluate or compare two things to make the condition. We need something that would make a condition not a decision :)