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Kotlin for each loop10/30/2023 So, for this I write sout, press 'Enter', and I write println(i). So, we should print the value of i to the console every time the loop runs. We use for this and in this field I will define the action that I want to be done. So, we've created the condition, now let's define the scope of the while loop. Because I want this loop to continue as long as the value of i > 0. So, I'll just choose the while option and I'll write (i > 0). So, I'm typing while here and look what our code editor suggests. So, for this operation, I'll just declare a variable i = 5 and now we'll create the while loop. So, let's do our first example like this, we will print the numbers from five down to one on the console. So first, let me just create a new Kotlin file and we'll call this file WhileLoop, see while. So, let me show you a few examples using while loop. If the condition returns false, the control comes out of the loop and jumps to the next statement after the while loop. So, generally the loop body contains an update value for the variable being processed for the next iteration. So, the condition is evaluated first and if it returns true then the statements in the loop body are executed. So, in the while loop, the controlling variable is previously defined. So, this is the video that we're going to learn about the while loop, not while loop, while loop just like the word. Or skip objects without name, or any other approach that suits your situation.Well, hello everyone. Please use name or "default" if the name is null. Val name = course.name ?: "default", saying I think that a much better approach is to provide an alternative, like: Please throw an Exception if the name is null. I'm considering this as a bad practice, cause in this case you're saying Probably because the Course can have nullable name, while Courses can't. Saying the same thing in Java you're doing something like this: for (course: Courses) Īlso, I've noticed that you're using the !! operator when creating a Courses object. You're getting the list with only on object, cause the function listOf(crs) returns a list of all objects that are passed as a parameters.
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