In Scala, we can use various methods and loops to iterate over an array. Here are few examples with explanations:
1. Using for loop:
The for loop is the most commonly used loop in Scala. We can iterate over an array using for loop as shown below:
val arr = Array(1, 2, 3, 4, 5)
for(i <- arr){
println(i)
}
In the above example, we have created an array of integers and used for loop to iterate over it. Here, i is the loop variable and the for loop iterates over all the elements in the array and prints them.
2. Using foreach method:
Scala provides a foreach method, which can be used to iterate over an array as shown below:
val arr = Array(1, 2, 3, 4, 5)
arr.foreach(println)
In the above example, we have used the foreach method to iterate over the array. The method takes a single argument, which is a function that will be applied to each element of the array. Here, we have passed println function which prints each element of the array.
3. Using while loop:
We can also use a while loop to iterate over an array as shown below:
val arr = Array(1, 2, 3, 4, 5)
var i = 0
while(i < arr.length){
println(arr(i))
i += 1
}
In the above example, we have used a while loop to iterate over the array. Here, i is the loop variable which starts from 0 and goes up to the length of the array. Inside the loop, we print the element at the ith index and increment the value of i by 1.
These are the three ways we can iterate over an array in Scala.