premennej

Premenná is a Slovak term used for a variable, a symbol or storage location that can hold different values. The genitive singular form premennej is used in phrases such as "hodnota premennej" (the value of a variable). The concept is central in mathematics, statistics, and computer science, and similar ideas appear across many languages under related terminology.

In mathematics, a variable represents an unknown quantity or a quantity that can change within a given context. Variables are used to formulate equations, functions, and inequalities; they may take values from a specified domain and can be bound to different numbers or objects depending on the problem. In algebra, x, y, and z are common examples of variables.

In programming, a variable is a named binding to a value of a certain data type. A variable’s value can be reassigned over the course of a program, and the sequence of assignments determines the program’s state. The scope of a variable defines where it can be accessed (local, global, or block scope), while its lifetime indicates how long it exists during execution.

Typing and mutability are important aspects. Some languages are statically typed, requiring a declared type for each variable, while others are dynamically typed, inferring or allowing types at runtime. Variables are typically named using letters, digits, and underscores, with case sensitivity common in many languages. Variations of the concept appear in data modeling, simulations, and analyses across sciences.