{"id":221,"date":"2013-03-27T08:13:00","date_gmt":"2013-03-27T06:13:00","guid":{"rendered":"https:\/\/celilsemi.erkiner.com\/blog\/?p=221"},"modified":"2020-05-29T12:58:32","modified_gmt":"2020-05-29T10:58:32","slug":"javascript-conditional-statements","status":"publish","type":"post","link":"https:\/\/celilsemi.erkiner.com\/blog\/javascript-conditional-statements\/","title":{"rendered":"JavaScript – Conditional Statements"},"content":{"rendered":"\n

JavaScript is a multi-paradigm, dynamic language with types and operators, standard built-in objects, and methods. Its syntax is based on the Java and C languages \u2014 many structures from those languages apply to JavaScript as well. JavaScript supports object-oriented programming with object prototypes, instead of classes. JavaScript also supports functional programming \u2014 functions are objects, giving functions the capacity to hold executable code and be passed around like any other object.<\/p>\n\n\n\n

In Javascript, a control structure, as the term implies, refers to the flow of execution of the program. There are two possible control structures: linear and nonlinear. The linear execution (also called sequential execution) refers to the execution of the statements in the order they are listed. In comparison, the non-linear execution refers to the execution of statements regardless of the order they are listed.<\/p>\n\n\n\n

Conditional Execution<\/h3>\n\n\n\n

In the simple case, we would like some code to be executed if a certain condition is hold but also we would like to have some code that handles the other case or cases.<\/p>\n\n\n\n

\n

If-Else <\/h3>\n\n\n\n

In JavaScript, basic conditional execution is created with ‘if’ and ‘else’ keywords. The \u2018if\u2019 keyword executes or skips a statement depending on the value of a Boolean expression. You can use the \u2018else\u2019 keyword, together with if, to create two separate, alternative execution paths.<\/p>\n<\/div><\/div>\n\n\n\n

var num = 5; \nif (num < 10) { \n\tconsole.log("Small"); \n} else { \n\tconsole.log("Large"); \n}\n\/\/> "Small"\n\nvar num = 150; \nif (num < 10) { \n\tconsole.log("Small"); \n} else { \n\tconsole.log("Large"); \n}\n\/\/> "Large"<\/pre><\/div>\n\n\n\n
\n
Switch-Case<\/h3>\n\n\n\n
There is a structure called switch which aims to express a chained if-else statement more directly in a more efficient way.<\/p>\n<\/div><\/div>\n\n\n\n
var user ="admin"; \nswitch (user) { \n\tcase "admin":\n\t\tconsole.log("Hello Admin!"); \n\t\tbreak;\n\tcase "user":\n\t\tconsole.log("Hello User!"); \n\t\tbreak;\n\tdefault:\n\t\tconsole.log("Hello Guest!"); \n\t\tbreak;\n}\n\/\/> "Hello Admin!"<\/pre><\/div>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
JavaScript is a multi-paradigm, dynamic language with types and operators, standard built-in objects, and methods. Its syntax is based on the Java and C languages \u2014 many structures from those languages apply to JavaScript as well. JavaScript supports object-oriented programming with object prototypes, instead of classes. JavaScript also supports functional programming \u2014 functions are objects, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","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":"default","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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[7],"tags":[42,4],"class_list":["post-221","post","type-post","status-publish","format-standard","hentry","category-front-end","tag-ecmascript","tag-javascript"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/posts\/221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/comments?post=221"}],"version-history":[{"count":1,"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/posts\/221\/revisions"}],"predecessor-version":[{"id":222,"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/posts\/221\/revisions\/222"}],"wp:attachment":[{"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/media?parent=221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/categories?post=221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/celilsemi.erkiner.com\/blog\/wp-json\/wp\/v2\/tags?post=221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}