Ruby Array Exercises: Swap the first and last elements of a given array of integers

Last update on December 21 2024 10:15:23 (UTC/GMT +8 hours)

Write a Ruby program to swap the first and last elements of a given array of integers, length will be at least 1. Return the modified array.

Ruby Code:

def check_array(nums)
    temp = nums[0];
	nums[0] = nums[nums.length-1];
	nums[nums.length-1] = temp;
	return nums;
end
print check_array([1]),"\n"
print check_array([1, 3]),"\n"
print check_array([1, 3, 5]),"\n"
print check_array([11, 3, 5, 21])  

Output:

[1]
[3, 1]
[5, 3, 1]
[21, 3, 5, 11]

Flowchart:

Ruby Code Editor:

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