Week 2 Exercises Hackerrank https://www.hackerrank.com/challenges/30-data-types/problem https://www.hackerrank.com/challenges/java-stdin-stdout/problem https://www.hackerrank.com/challenges/java-if-else/problem https://www.hackerrank.com/challenges/java-loops-i/problem codingbat.com https://codingbat.com/java/Warmup-1 https://codingbat.com/java/String-1 https://codingbat.com/java/Logic-1