shell while do done while do done syntax clarity syntax clarity marking blocks of code is one of the places where computing languages differ from one another some have special words that appear at the start and end of blocks like "doand "doneothers use various forms of brackets like "{and "}interestinglyprogrammers in these languages typically also indent code within the blocks for visual clarity python simply uses the indentation for its core syntax rather than just for ease of reading purely for interestthe shell and versions of while py are also in your home directory as while sh and while