Variables

Variables and Types in AWK

AWK has a deceptively simple type system that belies its expressive power. Unlike most languages where you declare variables before using them, AWK variables spring into existence the moment you …

Variables and Types in Assembly

Assembly language has no variables in the high-level sense — no int x = 42 or string name = "Alice". Instead, data lives in two places: registers (tiny, ultra-fast storage inside the CPU) …

Variables and Types in APL

In most languages, variables hold a single value. In APL, every variable holds an array — and that changes everything. A scalar (single number) is just an array of rank 0. A string is a character …

Variables and Types in ALGOL 68

Introduction

ALGOL 68 takes a distinctive approach to variables and types through what it calls its mode system. Rather than using the word “type,” ALGOL 68 uses “mode” to …

Variables and Types in ALGOL 60

ALGOL 60’s type system was genuinely revolutionary for 1960. At a time when FORTRAN distinguished INTEGER from REAL mostly by name convention, ALGOL 60 introduced a formal, compiler-enforced …

Variables and Types in Ada

Ada’s type system is one of the most powerful and distinctive features in all of programming. Where most languages use types as loose labels that the programmer must remember to respect, Ada …

Variables and Types in ABAP

ABAP’s type system was built from the ground up for business applications. Where most languages offer generic integers and floats, ABAP provides packed decimals for currency, fixed-length …

Variables and Types in Python

Python’s approach to variables is one of the things that makes it so approachable. There are no type declarations, no keywords like int or String — you simply assign a value to a name and Python …