Hello friends, "True", what is inside the parentheses of the "switch" command? Thank you for your help

Question

var age=parseInt(window.prompt("Please enter your age"));
switch(true){

case (age<12):
window.alert("You are a child");
break
case (age>=12 && age<=15):
window.alert("You are a teenager");
break
case (age>15 && age<=35):
window.alert("You are young");
break
case (age>35 && age<=60):
window.alert("You are middle-aged");
break;
case (age>60 && age<=100):
window.alert("You are an old man");
break
case (age>100):
window.alert("You are not alive");
break
default:
window.alert("You entered the wrong age");
break;
}

Answer 1

Would you like to know why they used true as switch expression?

Answer 2

It's a method to use logical operations and conditions in switch statement.
Switch has to be true for prompt to work.
For example, age=50 is true for case (age<35 && age<=60).
So, output will be "You are middle-aged"

Answer 3

Yes bro