The 15 coding languages with the highest salaries, and how to learn them online at no cost

· If you're unemployed, or are self-isolating and have extra time on your hands, learning how to code could help your career.
· According to jobs site Indeed.com, the two most in-demand jobs of 2020 are software architect and full-stack developer, both of which require a proficiency in coding.
· Tech company HackerRank...