[Solved] What does the expression arr[1..3] do when arr = [10, 20, 30, 40, 50]? — Ans: Returns a new array with elements at indexes 1, 2, and 3 | Ruby

Ruby - Arrays

What does the expression arr[1..3] do when arr = [10, 20, 30, 40, 50]?

AReturns a new array with elements at indexes 1, 2, and 3

BReturns a new array with elements at indexes 1 and 3 only

CReturns a new array with elements at indexes 1 and 2 only

DReturns a single element at index 3

Step-by-Step Solution

Solution:

Step 1: Understand the range operator '..'
The range 1..3 includes both 1 and 3, so it covers indexes 1, 2, and 3.
Step 2: Apply slicing to the array
Slicing arr[1..3] returns elements at indexes 1, 2, and 3, which are 20, 30, and 40.
Final Answer:
Returns a new array with elements at indexes 1, 2, and 3 -> Option A
Quick Check:
Range '..' includes end index = elements 20, 30, 40 [OK]

Quick Trick: Remember '..' includes the end index in slicing [OK]

Common Mistakes:

Master "Arrays" in Ruby

9 interactive learning modes - each teaches the same concept differently

More Ruby Quizzes

What does the expression arr[1..3] do when arr = [10, 20, 30, 40, 50]?