The later is suited for imperative style. The former is intended for a functional approach and I'll cover this is another post. You will continue to think imperatively, that is, “do this, do that, increment this, and as long as y < 42, just increment y”. Well there are two styles of for loops in Scala: foreach and for. If loops are one of the first things you learn in Scala, that will validate all the other concepts you might have encountered in other languages. In this example, we take a range of 1 to 4 i.e., 1, 4 and execute a print statement for each of the elements in the range using for loop. It’s as if you wanted to learn French but still pronounce the ‘h’. Learning loops to get familiar with Scala is bad. The for loop in Scala is used to iterate over a given sequence and executes a set of statements for each element in the sequence. What I actually got: What should we use instead? If you don’t want us to use them, why are you showing us this? What I was expecting from the audience: “OK, we’ve wiped my memory clean and fresh. I even continued further: “I’ve just shown you loops so that you can relate to them, but please don’t use them.”. It is a control structure in Scala, and in this article, well talk about the forms. For a long time, I’ve been guilty of this myself. Scala for loop lets us execute specific code a certain number of times. If the condition is True then the code within the body of the while loop is executed. It can be used to iterate, filter and return an iterated collection. The loops in Scala are : while Loop do.while Loop for Loop Nested Loops while Loop A while loop generally takes a condition in parenthesis. In scala, for loop is known as for-comprehensions. In this lesson, we will see the Scala for loop with its. Scala provides the different types of loop to handle the condition based situation in the program. People look confused, so the instructor continues: “Just trust me.”. A loop lets us execute a group of statement a set number of times, or until an expression becomes false. values are constants val x = 3 // variables are changeable, much like any other language var y = 4 y = 5 // reassignment ok // looping while ( y < 42 ) Īfter that, the instructor usually says: “Cool, now that you’ve learned about while, please don’t use them.
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