Please fill in the data types of the data shown below in the comments field:

Question

12 // number
"some text" //
_____?
true // _____????

Answer 1

Fill in the blanks to print EVEN values from 0 to 20 using a for loop:
var x = 0;

for (; x <=
; x +=
) {

document.write(x);

}

Answer 2

string
boolean

Answer 3

string
boolean

Answer 4

What's the result of the expression var1&&var2, if var1=true and var2=false?
true
false
undefined