Iterating over arrays in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print each element of the array.

Bash Scripting

arr=(apple banana cherry)
for item in [1]; do
  echo "$item"
done

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

A${arr[@]}

B$arr

C${arr}

D$arr[@]

Attempts:

3 left

💡 Hint

Common Mistakes

Using $arr instead of ${arr[@]} which only gives the first element.

Using ${arr} which does not expand all elements.

Using $arr[@] which is incorrect syntax.

Use ${arr[@]} to iterate over all elements of the array in bash.

2fill in blank

medium

Complete the code to get the length of the array.

Bash Scripting

arr=(dog cat mouse)
length=[1]
echo "Length is $length"

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

A${arr}

B${arr[@]}

C${#arr[@]}

D${#arr}

Attempts:

3 left

💡 Hint

Common Mistakes

Using ${#arr} which gives length of first element string, not array length.

Using ${arr[@]} which expands elements, not length.

Use ${#arr[@]} to get the number of elements in the array.

3fill in blank

hard

Fix the error in the code to correctly iterate over the array elements.

Bash Scripting

fruits=(mango orange pineapple)
for fruit in [1]; do
  echo "$fruit"
done

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

A$fruits

B${fruits}

C$fruits[@]

D${fruits[@]}

Attempts:

3 left

💡 Hint

Common Mistakes

Using $fruits which only gives first element.

Using $fruits[@] which is invalid syntax.

Use ${fruits[@]} to correctly expand all elements for iteration.

4fill in blank

hard

Fill both blanks to create an array and print its elements using a loop.

Bash Scripting

my_array=([1])
for element in [2]; do
  echo "$element"
done

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

A"red" "green" "blue"

B${my_array}

C${my_array[@]}

Dmy_array

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting array elements causing word splitting.

Using ${my_array} which only expands first element.

Use quotes to define array elements and ${my_array[@]} to iterate all elements.

5fill in blank

hard

Fill all three blanks to create an array, get its length, and print each element.

Bash Scripting

colors=([1])
count=[2]
echo "Total colors: $count"
for color in [3]; do
  echo "$color"
done

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

A"yellow" "purple" "cyan"

B${#colors[@]}

C${colors[@]}

D${colors}

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted elements causing word splitting.

Using ${colors} instead of ${colors[@]} in the loop.

Using ${#colors} which gives length of first element string.

Define array with quoted elements, get length with ${#colors[@]}, iterate with ${colors[@]}.