Accessing array elements in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the first element of the array.

Bash Scripting

arr=(apple banana cherry)
echo ${arr[[1]]}

Drag options to blanks, or click blank then click option'

A0

B1

C3

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 1 to get the first element.

Forgetting the square brackets.

Using parentheses instead of brackets.

In bash arrays, the first element is accessed with index 0, so ${arr[0]} prints 'apple'.

2fill in blank

medium

Complete the code to print the last element of the array.

Bash Scripting

arr=(dog cat mouse)
echo ${arr[[1]]}

Drag options to blanks, or click blank then click option'

A1

B2

C3

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using a negative index.

Using index 3 which is out of range.

Using index 1 which is the second element.

The last element in a 3-element array is at index 2, so ${arr[2]} prints 'mouse'.

3fill in blank

hard

Fix the error in the code to print the second element of the array.

Bash Scripting

arr=(red green blue)
echo ${arr[[1]]}

Drag options to blanks, or click blank then click option'

A1

B{1}

C(1)

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses or curly braces instead of square brackets.

Using index 2 which is the third element.

Forgetting the dollar sign before the array.

Bash arrays use square brackets for indexing, so ${arr[1]} prints 'green'.

4fill in blank

hard

Fill the three blanks to print the third element of the array.

Bash Scripting

arr=(sun moon stars)
echo ${arr[{BLANK_2}}]

Drag options to blanks, or click blank then click option'

A[

B]

C2

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong brackets or missing one bracket.

Using index 3 which is out of range.

Putting brackets in the wrong order.

5fill in blank

hard

Complete the code to print the second element of the array.

Bash Scripting

arr=(one two three)
echo ${arr[{BLANK_2}}]

Drag options to blanks, or click blank then click option'

A[

B1

C]

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 2 which is the third element.

Missing one of the brackets.

Putting brackets after the index.

The brackets must surround the index.