{"id":120028,"date":"2023-11-02T18:00:35","date_gmt":"2023-11-02T12:30:35","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=120028"},"modified":"2023-11-02T18:05:13","modified_gmt":"2023-11-02T12:35:13","slug":"swift-decision-making","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/swift-decision-making\/","title":{"rendered":"Swift Decision Making"},"content":{"rendered":"

Decision making helps us control the flow of our code based on given conditions. Swift supports various control structures for decision making. In this article, we\u2019ll learn about control statements in Swift, their usage and their implementation with the help of relevant examples.<\/p>\n

Conditional Statements in Swift<\/h2>\n

Conditional statements control the code flow based on certain conditions. The following are the control statements we use in Swift Programming.<\/p>\n\n\n\n\n\n\n\n
Statements<\/b><\/td>\nDescription<\/b><\/td>\n<\/tr>\n
if statement<\/span><\/td>\nIt consists of a condition followed by code expressions<\/span><\/td>\n<\/tr>\n
if-else statement<\/span><\/td>\nIt consists of a condition along with an optional else statement, which is executed when the condition is false.<\/span><\/td>\n<\/tr>\n
if\u2026else-if\u2026else statement<\/span><\/td>\nIt consists of a condition along with an optional else if\u2026else statement. It tests several conditions using single if\u2026else statements.<\/span><\/td>\n<\/tr>\n
Nested if statement<\/span><\/td>\nIt consists of if or else if statements enclosed within another if or else if statements.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

if Statements in Swift<\/h3>\n

if statements are the condition statements that check if the condition is true. If it is true, then we execute the expression enclosed within it.<\/p>\n

\"if<\/a><\/p>\n

Syntax of if statements.<\/strong><\/p>\n

if(condition){\r\n    Expression\r\n}<\/pre>\n
For example,<\/strong><\/p>\n
let year = 2023\r\nif(year != 2020){\r\n    print(\"DataFlair\")\r\n}<\/pre>\n
Output:<\/b><\/p>\n
DataFlair<\/p>\n
if-else Statements in Swift<\/h3>\n
if-else statements are the condition statements that check the condition. It executes the expressions accordingly. If it is true, then the expression enclosed within it is executed. If it is false, then the expression within the else scope is executed.<\/p>\n
\"if<\/a><\/p>\n
Syntax of if-else statements.<\/strong><\/p>\n
if(condition){\r\n    Expression1\r\n}else{\r\n    Expression2\r\n}<\/pre>\n
For example,<\/strong><\/p>\n
let year = 2023\r\nif(year == 2020){\r\n    print(\"Swift\")\r\n}else{\r\n    print(\"DataFlair\")\r\n}<\/pre>\n
Output:<\/strong><\/p>\n
DataFlair<\/p>\n
if\u2026else-if\u2026else Statements in Swift<\/h3>\n
if\u2026else-if\u2026else statements are the condition statements which check the condition. It executes the expressions accordingly. If it is true, then the expression enclosed within it is executed if it is false, then the expression within the next else-if or else scope is executed.<\/p>\n
Syntax of if\u2026else-if\u2026else statements.<\/strong><\/p>\n
if(condition){\r\n    Expression1\r\n}else if(condition){\r\n    Expression2\r\n}else{\r\n    Expression3\r\n}<\/pre>\n
For example,<\/strong><\/p>\n
let year = 2023\r\nif(year == 2020){\r\n    print(\"Swift\")\r\n}else if(year == 2023){\r\n    print(\"DataFlair\")\r\n}else{\r\n    print(\"Decision Making\")\r\n}<\/pre>\n
Output:<\/strong><\/p>\n
DataFlair<\/p>\n
Nested if Statements in Swift<\/h3>\n
In nested if statements, two or more if statements are enclosed inside each other. Each if statement has its condition. Based on whether the condition is true or not, further expressions are executed.<\/p>\n
Syntax of nested if statements.<\/strong><\/p>\n
if(condition1){\r\n    if(condition2){\r\n        Expression\r\n    }\r\n}<\/pre>\n
let year = 2023\r\nif(year != 2020){\r\n    if(year == 2023){\r\n        print(\"DataFlair\")\r\n    }\r\n}<\/pre>\n
Output:<\/strong><\/p>\n
DataFlair<\/p>\n
Switch Statements in Swift<\/h3>\n
Switch statements help us manage multiple values for a single variable.<\/p>\n
Syntax of switch statements.<\/strong><\/p>\n
switch expression{\r\ncase expression 1:\r\n    Statement 1\r\n    fallthrough \t\t\/\/optional\r\ncase expression 2:\r\n    Statement 2\r\n    fallthrough \t\t\/\/optional\r\ncase expression 3:\r\n    Statement 3\r\n    fallthrough \t\t\/\/optional\r\ndefault:\r\n    Statement 4\r\n}<\/pre>\n
The keyword fallthrough in a case means the expressions\/statements in the next cases should be executed irrespective of whether the condition is met. If this is not used, then the flow comes out of the switch scope when the execution of expression where conditions are met is done.<\/p>\n
let year = 2023\r\n\r\nswitch (year){\r\n    case 2020, 2021, 2022:\r\n        print(\"Swift\")\r\n    case 2023:\r\n        print(\"DataFlair\")\r\n    default:\r\n        print(\"Invalid\")\r\n}<\/pre>\n
Output:<\/strong><\/p>\n
DataFlair<\/p>\n
Ternary Operator in Swift<\/h3>\n
The ternary operator is a special conditional operator. It operates on three operands: a condition, a true result and a false result. If the condition is true, then it returns the true result. If the condition is false, it returns a false result.<\/p>\n
let year = 2023\r\nlet trueOutput = (year == 2023) ? \"DataFlair\" : \"Not DataFlair\"\r\nprint(trueOutput)\r\n\r\nlet falseOutput = (year != 2023) ? \"DataFlair\" : \"Not DataFlair\"\r\nprint(falseOutput)<\/pre>\n
Output:<\/strong><\/p>\n
DataFlair
\nNot DataFlair<\/p>\n
Conclusion<\/h3>\n
To conclude, decision making is an important part of programming. In Swift, it can be achieved using various ways mentioned above. We can use if, if-else, if\u2026else-if\u2026else or nested if to deal with conditional statements. We can use switch statements to manage multiple variables and conditional statements. Ternary Operator in Swift is a concise and compact way to implement decision making.<\/p>\n","protected":false},"excerpt":{"rendered":"
Decision making helps us control the flow of our code based on given conditions. Swift supports various control structures for decision making. In this article, we\u2019ll learn about control statements in Swift, their usage...<\/p>\n","protected":false},"author":581,"featured_media":120030,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27789],"tags":[28414,28413,28412,20583,14629],"class_list":["post-120028","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-swift-tutorials","tag-conditional-operators","tag-decision-making-in-swift","tag-swift-decision-making","tag-switch-statements","tag-ternary-operator"],"yoast_head":"\nSwift Decision Making - DataFlair<\/title>\n<meta name=\"description\" content=\"Swift Decision making is an important part of programming. 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