# **📐 Booth: ALGOL 60 (1960)** * **Creator:** A joint European-American committee of computer scientists (including John Backus, John McCarthy, and Peter Naur) * **Design Philosophy:** "Algorithmic Language" — aimed at establishing a universal, platform-independent language optimized for describing algorithms in academic and scientific publications. * **Key Innovations:** Nested block scopes (begin and end), lexical variable scoping, recursive functions, formal parameter lists, and the Backus-Naur Form (BNF) notation for describing language syntax. Almost all imperative languages (C, Pascal, Java, Rust, Swift) trace their design ancestry to ALGOL. ## **🌌 The Ancestor of Modern Syntax** While you rarely see pure ALGOL 60 compiling in production systems today, its syntactic legacy is everywhere. It introduced the block structure where variables declared inside a block (begin ... end) are invisible outside it. This simple structural rule eliminated chaotic memory conflicts and cleared the path for the structured programming explosion of the 1970s. ## **🚀 Hello, World\!** begin outstring(1, "Hello, World\!"); end ## **🎨 Showpiece: Euclidean Algorithm (GCD)** This program computes the greatest common divisor (![][image1]) of two integers recursively, showcasing structured nested loops and functional outputs. ![][image2]begin integer procedure gcd(a, b); value a, b; integer a, b; begin if b \= 0 then gcd := a else gcd := gcd(b, a \- (a div b) \* b); end; integer x, y; x := 54; y := 24; outinteger(1, gcd(x, y)); end [image1]: [image2]: