About Lesson
Q3. What will be the output of this code? Also explain why
let a = 10;
console.log(“line number 2”, a);
function fn() {
console.log(“line number 4”, a);
let a = 20;
a++;
console.log(“line number 7”, a);
if (a) {
let a = 30;
a++;
console.log(“line number 11”, a);
}
console.log(“line number 13”, a);
}
fn();
console.log(“line number 16”, a);
ans:
Output ->
Line has runtime error: console.log(“line number 4”, a);
if we will hide it, then the result
console.log(“line number 2”, 10);
console.log(“line number 7”,21);
console.log(“line number 11”, 31);
console.log(“line number 13”, 21);
console.log(“line number 16”, 10);
