In Kotlin switch case with string, when is mainly used in two ways:<\/strong><\/p>\n When’ is an expression compared with other branches. If it used as a statement, the branch values compared sequentially with the argument and execute the corresponding branch where the condition matches. Here in this blog, we\u2019ll look at how switch replaces the when.<\/p>\n Let\u2019s start with understanding Switch in Kotlin Android<\/strong> and then we\u2019ll check how the when keyword makes our code easier and more understandable.<\/p>\n Suppose you have used a conditional statement where the condition used in the conditional statement applies to a similar type of data. Then instead of that use vast code for the conditional statement. Use the switch to avoid using too many conditional statements in our code. Let\u2019s study with the help of an example.<\/p>\n Let\u2019s consider one example where we have to return emoji based on input spring.<\/p>\n Similar to if\/else, the switch is one of the ancient ways to deal with conditional execution. Whereas in Kotlin, we can replace switch case and if\/else with when similarly, we implement the conditional execution. Now the switch can replace with the when statement also to if\/else. Make the code more readable, consistent and adapt quickly with new developers.<\/p>\n Till now, you have seen the ability of when the block in Kotlin switch case<\/strong> with spring replaces conditional statements. But well, it can do more than this. Let’s say, it can return the values from the conditional blocks after you execute the necessary steps.<\/p>\n We can also use more than one checks to execute a block when the operator<\/p>\n We\u2019ve used \u2018when\u2019 with an argument. But when the real potential of when is we use when without an argument. Understand how it looks.<\/p>\n Later, it acts as an if\/else block with class-level variable conditions.<\/p>\n We can check whether the given operator is an instance of a particular type at runtime by using the \u2018is\u2019 operator. The operator \u2018is\u2019 works similar to the instanceof operator in Java. Now use the \u2018is\u2019 and \u2018!is\u2019 operator inside when block. Get to know how Kotlin switch case with string<\/strong> works with an example.<\/p>\n Java uses Switch conditional statements that operated with primitive data types, string class, and Kotlin switch enums<\/strong>. instead, Kotlin allows when to be used with any user-defined types. It makes it developer-friendly.<\/p>\n Unlike Java, Kotlin\u2019s when can use with dynamic value like return type of functions. The else is mandatory if you\u2019re using when as an expression.<\/p>\n In Kotlin, few simple utility functions are used for a simple task. Let\u2019s say if you want to get a minimum or maximum value in the range. Similarly, the average value of the sum of range, total count or value of the range, etc.<\/p>\n Check below Kotlin Functions<\/strong><\/p>\n In this blog, we have seen how powerful and useful the kotlin when the expression is. If you\u2019re using Kotlin, you find yourself using the when expression all the time. Connect with us if you\u2019re seeking to Hire Kotlin App Developers<\/strong><\/span><\/a> and switch to Kotlin when.<\/p>\n\n
<\/span>Switch<\/span><\/h2>\n
![\"input](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/Untitled-2-1-2.png\" "\\"input")
\nBut if we rewrite the code using the When statement in Kotlin, then it provides better readability than if\/else. In the above code, if\/else statement replaced with the when statement.<\/p>\n![\"fun](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/1-1-2.png\" "\\"fun")
<\/p>\n<\/span>Replace Switch Case Kotlin with When<\/span><\/h3>\n
![\"Replace](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/Untitled-3-2.png\" "\\"Replace")
<\/p>\n<\/span>Return values with When Block<\/span><\/h3>\n
![\"Return](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/Untitled-4-2.png\" "\\"Return")
<\/p>\n<\/span>Arbitrary Condition with When<\/span><\/h3>\n
![\"Arbitrary](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/Untitled-5-2.png\" "\\"Arbitrary")
\nThere are several causes, but only one case that matches up will work as a respective block of code that executed. The comma added in the above example act as an OR operator.<\/p>\n<\/span>Using When without an Argument<\/span><\/h3>\n
![\"Using](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/Untitled-6-2.png\" "\\"Using")
<\/p>\n<\/span>Now, Compare the instance with When<\/span><\/h3>\n
![\"Now,](\"https:\/\/websitelaravel.concettoprojects.com\/blog\/wp-content\/uploads\/2020\/11\/Untitled-7-2.png\" "\\"Now,")
<\/p>\n<\/span>Main points about Kotlin when<\/span><\/h3>\n
\nAlso, check whether the given argument in collections uses the \u2018in\u2019 operator, which acts as contains.<\/p>\n<\/span>Example of a wide range of utility functions<\/span><\/h3>\n
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<\/span>Summary<\/span><\/h2>\n