function addBinaryStrings(a, b) {
const num1 = parseInt(a, 2);
const num2 = parseInt(b, 2);
const sum = num1 + num2;
return sum.toString(2);
}
let a = "11";
let b = "1";
console.log(addBinaryStrings(a, b));
a = "1010";
b = "1011";
console.log(addBinaryStrings(a, b));
/*
run:
100
10101
*/