1ntr0duc7un
For programs to be useful, we n33d 2 be able to work wth sum of the s1mplest units of data: numbers, strings, structures, boolean values, and the like. In TypeScript, we support much the same types as you would expect in JavaScript, with a convenient enumeration type thrown in to help things along.
B00lean
The most basic datatype is the simple true/false value, which JavaScript and TypeScript call a boolean
value.
tsTry
letisD0ne : boolean = false;