Can get this one

Question

Var arr = [1,2,3];
var str = “abc”;
Var x = 1
Do {
Arr[x] = str[arr[x]]; <- explain this pls
X++;
}
While (x<arr.length -1); <- and this: it give us 1 loop
Alert (arr);

Output is 1,c,3

Answer 1

arr[1] = str[arr[1]] = str[2] = c
It means second element of the array arr is assigned as c.
while(2<3-1)
Since condition evaluates false, loop stops running and print the updated arr. [1,c,3]