{"id":3463,"date":"2025-10-05T00:00:00","date_gmt":"2025-10-04T22:00:00","guid":{"rendered":"https:\/\/tecnologia.euroinnova.com\/variable\/"},"modified":"2026-08-05T11:09:02","modified_gmt":"2026-08-05T09:09:02","slug":"variable","status":"publish","type":"post","link":"https:\/\/tecnologia.euroinnova.com\/en\/variable","title":{"rendered":"Variable"},"content":{"rendered":"<p>In computing, a variable is a space in the computer\u2019s memory used to store a value. This value can be of any type, such as a number, a string of text, a Boolean or an object. If you\u2019re wondering <strong>What is a variable in programming?<\/strong>, it is precisely this data container that enables information to be manipulated and processed within a programme.<\/p>\n<h2 id=\"funcionalidades-de-las-variables-en-informatica\">Functions of variables in computer science<\/h2>\n<p>In computing, variables are used to store data that will be used in the programme. For example, the variable \u2018age\u2019 is used to store a person\u2019s age. This leads us to ask ourselves <strong>What type of variable is age?<\/strong>; in this case, it is an integer variable.<\/p>\n<p>Variables can be used to perform mathematical operations, such as addition, subtraction, multiplication and division. For example, the expression age + 1 is used to calculate a person\u2019s age one year later.<\/p>\n<p>Variables can also be used to control the flow of the programme, such as for loops or conditional statements. For example, the variable \u2018age\u2019 can be used to <strong>set variable<\/strong> which determines whether a loop should continue or not, as in the case of a minor.<\/p>\n<h2 id=\"tipos-de-variables\">Types of variables<\/h2>\n<p>In computer science, variables can be classified into various types, depending on their nature and behaviour. Here are a few examples <strong>examples of variables<\/strong> which help to understand this classification.<\/p>\n<h3 id=\"segun-su-naturaleza\">Depending on their nature<\/h3>\n<ul>\n<li><strong>Numeric variables<\/strong>: Numerical variables represent numerical quantities. They can be integer variables, decimal variables or rational variables.<\/li>\n<li><strong>Non-numeric variables<\/strong>: Non-numeric variables represent non-numeric quantities. They can be categorical variables, ordinal variables or nominal variables.<\/li>\n<\/ul>\n<p>An example of <strong>in programming, a data type whose value does not change<\/strong> it would be a constant, such as <code>\u03c0 = 3.1416<\/code>, the value of which remains constant throughout the programme\u2019s execution.<\/p>\n<h3 id=\"segun-su-comportamiento\">Depending on their behaviour<\/h3>\n<ul>\n<li><strong>Static variables<\/strong>: Static variables are declared in the global scope of the programme. Their value cannot be changed whilst the programme is running.<\/li>\n<li><strong>Dynamic variables:<\/strong> Dynamic variables are declared within the local scope of a function or procedure. Their value can be changed whilst the programme is running.<\/li>\n<\/ul>\n<p>Furthermore, depending on the language, there are specific classifications, such as the <strong>Types of variables in C++<\/strong>, which include <code>int<\/code>, <code>float<\/code>, <code>double<\/code>, <code>char<\/code>, <code>bool<\/code>, amongst others, enabling greater accuracy and control over the data being processed.<\/p>\n<h2 class=\"text-align-justify\" id=\"declaracion-de-variables-en-informatica\">Declaration of variables in computer science&nbsp;<\/h2>\n<p class=\"text-align-justify\">To declare a <a href=\"https:\/\/tecnologia.euroinnova.com\/en\/date-java\/\">variable <\/a>In computer science, the syntax used varies depending on the programming language:&nbsp;<\/p>\n<p class=\"text-align-justify\">For Java:&nbsp;<\/p>\n<p class=\"text-align-justify\">variable_type variable_name;&nbsp;<\/p>\n<p class=\"text-align-justify\">For example, to declare an integer variable called \u2018age\u2019, you would use the following syntax:&nbsp;<\/p>\n<p class=\"text-align-justify\">int age;&nbsp;<\/p>\n<h3 class=\"text-align-justify\" id=\"asignacion-de-valores-a-variables-en-informatica\">Assigning values to variables in computing&nbsp;<\/h3>\n<p class=\"text-align-justify\">In computing, the = operator is used to assign a value to a variable. For example, to assign the value 30 to the variable \u2018age\u2019, the following expression would be used:&nbsp;<\/p>\n<p class=\"text-align-justify\">age = 30;&nbsp;<\/p>\n<h3 class=\"text-align-justify\" id=\"uso-de-variables-en-informatica\"><strong>The use of variables in computing&nbsp;<\/strong><\/h3>\n<p class=\"text-align-justify\">For Python:&nbsp;<\/p>\n<p class=\"text-align-justify\">x = 5&nbsp;<\/p>\n<p class=\"text-align-justify\">name = \u00ab\u00bb&nbsp;&nbsp;<\/p>\n<p class=\"text-align-justify\">Variables can be used anywhere in a computer programme. For example, they can be used in statements, functions, procedures, expressions and operators.&nbsp;<\/p>\n<h2 class=\"text-align-justify\" id=\"ejemplos-de-uso-de-variables-en-informatica\">Examples of the use of variables in computing&nbsp;<\/h2>\n<p class=\"text-align-justify\"><strong>Instructions:<\/strong><\/p>\n<p class=\"text-align-justify\">\/\/ Assign the value 10 to the variable `x`&nbsp;<\/p>\n<p class=\"text-align-justify\">x = 10;&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Print the value of the variable `x`&nbsp;<\/p>\n<p class=\"text-align-justify\">System.out.println(x);&nbsp;<\/p>\n<p class=\"text-align-justify\"><strong>Features:&nbsp;<\/strong><\/p>\n<p class=\"text-align-justify\">public int add(int a, int b) {&nbsp;<\/p>\n<p class=\"text-align-justify\">&nbsp; return a + b;&nbsp;<\/p>\n<p class=\"text-align-justify\">}&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Use the `sumar()` function&nbsp;<\/p>\n<p class=\"text-align-justify\">int result = sum(10, 20);&nbsp;<\/p>\n<p class=\"text-align-justify\">System.out.println(result);&nbsp;<\/p>\n<p class=\"text-align-justify\"><strong>Procedures:&nbsp;<\/strong><\/p>\n<p class=\"text-align-justify\">public void printName() {&nbsp;<\/p>\n<p class=\"text-align-justify\">&nbsp; System.out.println(\u00abMy name is Juan\u00bb);&nbsp;<\/p>\n<p class=\"text-align-justify\">}&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Use the `printName()` procedure&nbsp;<\/p>\n<p class=\"text-align-justify\">printName();&nbsp;<\/p>\n<p class=\"text-align-justify\"><strong>Expressions:&nbsp;<\/strong><\/p>\n<p class=\"text-align-justify\">int x = 10;&nbsp;<\/p>\n<p class=\"text-align-justify\">int y = 20;&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Calculate the sum of `x` and `y`&nbsp;<\/p>\n<p class=\"text-align-justify\">int sum = x + y;&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Print the sum&nbsp;<\/p>\n<p class=\"text-align-justify\">System.out.println(sum);&nbsp;<\/p>\n<p class=\"text-align-justify\"><strong>Operators:&nbsp;<\/strong><\/p>\n<p class=\"text-align-justify\">int x = 10;&nbsp;<\/p>\n<p class=\"text-align-justify\">int y = 20;&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Multiply `x` by `y`&nbsp;<\/p>\n<p class=\"text-align-justify\">int product = x * y;&nbsp;<\/p>\n<p class=\"text-align-justify\">\/\/ Print the multiplication result&nbsp;<\/p>\n<p class=\"text-align-justify\">System.out.println(multiplication);&nbsp;<\/p>\n<p>These are just a few <strong>programming examples<\/strong> to illustrate how variables are used in different contexts.<\/p>","protected":false},"excerpt":{"rendered":"<p>En inform\u00e1tica, una variable es un espacio en la memoria del ordenador que se utiliza para almacenar un valor. Este [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-3463","post","type-post","status-publish","format-standard","hentry","category-metaterminos"],"acf":[],"_links":{"self":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts\/3463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/comments?post=3463"}],"version-history":[{"count":0,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/posts\/3463\/revisions"}],"wp:attachment":[{"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/media?parent=3463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/categories?post=3463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tecnologia.euroinnova.com\/en\/wp-json\/wp\/v2\/tags?post=3463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}