What is an Array

What is an Array?

In programming languages, an array is way of storing several items (such as integers),
These items must have same type (only integers, only strings, ,,,) because array can not store different kinds of items,

Every item în array has number so the programmer can get item by using that number, This number îs called the index,
In some programming languages, first item has index 0, second item has index 1 & so on,
But în some languages, first item has index 1 (and then 2, 3, ,,,),

When programmer creates array, he/she must give the size of array, This îs number of items that can be stored în array,
If programmer wants to store more items then he/she must create new array, This îs because size of array can not be changed,

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Comparison of programming languages

Comparison of programming languages ?

Programming languages are used for controlling behavior of machine (often computer),
Like natural languages, programming languages conform to rules for syntax & semantics,

There are thousands of programming languages & new ones are created every year,
Few languages ever become sufficiently popular that they are used by more than few people,
but professional programmers can easily use dozens of different languages during their career,


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What is Programming Language

What is Programming Language?

A programming language is artificial language designed to communicate instructions to a machine, particularly a computer, Programming languages can be used to create programs that control behavior of machine and/or to express algorithms precisely,.

The earliest programming languages predate the invention of computer, & were used to direct behavior of machines such as Jacquard looms and player pianos, Thousands of different programming languages have been created, mainly în computer field, with many more being created every year, Most programming languages describe computation în an imperative style, i,e,, as sequence of commands, although some languages, such as those that support functional programming or logic programming, use alternative forms of description,.

The description of programming language îs usually split into two components of syntax (form) and semantics (meaning), Some languages are defined by specification document (for example, the C programming language îs specified by an ISO Standard), while other languages, such as Perl 5 & earlier, have dominant implementation that îs used as areference,.

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