What is wrong with this code

Question

var expression = readLine();
for(var1=0;1<3; 1++){
console.log(expression )
}
//your code goes here

Answer 1

1) readLine is not a valid function in vanilla javascript.
2) Variable names cannot start with a number (so "var 1" and "1++" will throw an error).

Answer 2

You have to use the same variables throughout the loop

var expression = readLine();
for(var1=0; var1 < 3; var1++){
console.log(expression )
}
//your code goes here