Like the while and do-while statements, the if-else if-else also performs conditional tests, but in contrast, they do not perform iteration (looping).<\/p>\n
Single IF statement<\/b><\/p>\n
The simplest for is the single if<\/b> statement. This construct simply executes an additional block of code when a condition is found to be true<\/b> (non zero in C).<\/p>\n This is depicted in the following flow-chart.<\/p>\n Note how the consequent branch re-joins the main program flow.<\/p>\n if-else<\/b><\/p>\n A Boolean condition is either TRUE or FALSE. You use the combination of if <\/b>and else<\/b> statements to perform different processes for each outcome. This construct simply executes one block of code for the TRUE condition, and another block of code for the FALSE.<\/p>\n This is depicted in the following flow-chart.<\/p>\n Once again, the code rejoins the main flow.<\/p>\n if-else if-else<\/b><\/p>\n This is used to test multiple conditions using a process of elimination<\/b>. As with the previous two cases, the outcome always results with one block of code (consequent process) being exclusively<\/b> executed.<\/p>\n <\/p>\n This is depicted in the following flow-chart.<\/p>\n Note again that each consequent process is mutually exclusive<\/b> and evaluated in a specific sequence. For example, if both conditional statements A and B happen to be TRUE, only consequent process A would execute as this is tested first.<\/p>\n Contrast this with multiple if-else statements<\/i><\/p>\n <\/p>\n This is depicted in the following flow-chart.<\/p>\n Note the key difference here<\/b>. ALL conditions are tested in order. For example, if conditional statements A and C are both true, then consequent processes A and B will both<\/strong> be executed (in sequence).<\/p>\n","protected":false},"excerpt":{"rendered":" Conditional statements are what add the decision making and to some extent, business logic to software. At a fundamental level, a computer does only a few distinct tasks: Fetch and store Modify (arithmetic and bitwise operations) Flow control (conditionally branch) Like the while and do-while statements, the if-else if-else also performs conditional tests, but in… Continue reading if-else if-else statement (Glossary Entry)<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":153,"menu_order":60,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-406","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/pages\/406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/comments?post=406"}],"version-history":[{"count":1,"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/pages\/406\/revisions"}],"predecessor-version":[{"id":411,"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/pages\/406\/revisions\/411"}],"up":[{"embeddable":true,"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/pages\/153"}],"wp:attachment":[{"href":"https:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-json\/wp\/v2\/media?parent=406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}if ( <conditional statement>)\u00a0 {\r\n\r\n\/\/Consequent Process\r\n\r\n}\r\n<\/pre>\n![\"\"](\"http:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-content\/uploads\/sites\/94\/2018\/10\/FlowChartIF.png\")
<\/p>\nif ( <conditional statement>)\u00a0 {\r\n\r\n\/\/Consequent Process for TRUE\r\n\r\n} else {\r\n\r\n\/\/Consequent Process for FALSE\r\n\r\n}<\/pre>\n![\"\"](\"http:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-content\/uploads\/sites\/94\/2018\/10\/FlowChartIFELSE.png\")
<\/p>\nif ( <conditional statement 1>)\u00a0 {\r\n\r\n\/\/Consequent Process for Conditional Statement 1\r\n\r\n} else if ( <conditional statement 2>)\u00a0 {\r\n\r\n\/\/Consequent Process for Conditional Statement 2\r\n\r\n} else if ( <conditional statement N>)\u00a0 {\r\n\r\n\/\/Consequent Process for Conditional Statement N\r\n\r\n} else {\r\n\r\n\/\/Consequent Process for all other conditions\r\n\r\n\/\/(optional)\r\n\r\n}<\/pre>\n![\"\"](\"http:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-content\/uploads\/sites\/94\/2018\/10\/FlowChartIFELSEIFELSE.png\")
<\/p>\nif ( <conditional statement 1>)\u00a0 {\r\n\r\n\/\/Consequent Process for Conditional Statement 1\r\n\r\n} else {\r\n\r\n\/\/Complimentary Consequent Process\u00a0\r\n\r\n}\r\n\r\nif ( <conditional statement 2>)\u00a0 {\r\n\r\n\/\/Consequent Process for Conditional Statement 2\r\n\r\n} else {\r\n\r\n\/\/Complimentary Consequent Process\u00a0\r\n\r\n}\r\n\r\nif ( <conditional statement N>)\u00a0 {\r\n\r\n\/\/Consequent Process for Conditional Statement N\r\n\r\n} else {\r\n\r\n\/\/Complimentary Consequent Process\u00a0\r\n\r\n}<\/pre>\n![\"\"](\"http:\/\/blogs.plymouth.ac.uk\/embedded-systems\/wp-content\/uploads\/sites\/94\/2018\/10\/FlowChartMultipleIFELSE.png\")
<\/p>\n