BLISS (Bill's Language for Implementing System Software) is a system programming language developed at Carnegie Mellon University. typeless block-structured language based on expressions rather than statements, and includes constructs for exception handling,coroutines, and macros. It does not include a goto statement. Bliss programming language provides the many features of the high-level programming languages and object-oriented programming languages. BLISS provides the block structure, an automatic stack, and mechanisms for defining and calling recursive routines. It has many pre-defined data structures and facilities for testig and iterations.
Function factorial(n) = If.n <=1 then 1 else .n *factorial(.n-1); Function QQ search (k) = Begin register R,Q,A,E; E-R-K|.n;Q .k mod .n; A-.const; Do if .ST[.R] = .K Then return .R Else(R-.R+.A;A-.A-Q) Until .R = .E End;