if-then-fi structure in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the variable num is equal to 5.

Bash Scripting

if [ "$num" [1] 5 ]; then
  echo "Number is five"
fi

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

A==

B=

C-eq

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using string comparison operators like '=' or '==' for numbers.

Forgetting spaces around brackets and operators.

In bash, to compare integers inside [ ], use -eq for equality.

2fill in blank

medium

Complete the code to check if the file myfile.txt exists.

Bash Scripting

if [1] myfile.txt; then
  echo "File exists"
fi

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

Atest -s

Btest -d

Ctest -f

Dtest -e

Attempts:

3 left

💡 Hint

Common Mistakes

Using -d which checks only directories.

Using -s which checks if file is not empty.

test -e checks if a file or directory exists.

3fill in blank

hard

Fix the error in the if statement to correctly check if count is greater than 10.

Bash Scripting

if [ $count [1] 10 ]; then
  echo "Count is large"
fi

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

A<

B-gt

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' inside single brackets which is a string comparison and needs escaping.

Using '==' which is for string equality.

For numeric comparisons in bash, use -gt for 'greater than'.

4fill in blank

hard

Fill both blanks to check if the variable word is not empty and equals "hello".

Bash Scripting

if [ -n [1] ] && [ [2] = "hello" ]; then
  echo "Greeting detected"
fi

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

A$word

B-z

D"hello"

Attempts:

3 left

💡 Hint

Common Mistakes

Using -z which checks for empty string.

Not using the variable with a $ sign.

-n $word checks if word is not empty, and $word = "hello" checks string equality.

5fill in blank

hard

Fill all three blanks to check if num is between 1 and 10 inclusive.

Bash Scripting

if [ [1] -ge 1 ] && [ [2] [3] 10 ]; then
  echo "Number is between 1 and 10"
fi

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

A$num

C-le

D-lt

Attempts:

3 left

💡 Hint

Common Mistakes

Using string comparison operators instead of numeric ones.

Using -lt instead of -le for the upper bound.

Use $num -ge 1 to check greater or equal 1, and $num -le 10 to check less or equal 10.