Why conditionals branch script logic in Bash Scripting - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a file exists.

Bash Scripting

if [ -e [1] ]; then
  echo "File exists"
fi

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

Afilename

B-f

C/tmp

Dmyfile.txt

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the test option like -f instead of the file name.

Leaving the blank empty.

The test command [ -e myfile.txt ] checks if the file named 'myfile.txt' exists.

2fill in blank

medium

Complete the code to print "Yes" if variable x equals 10.

Bash Scripting

x=10
if [ [1] -eq 10 ]; then
  echo "Yes"
fi

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

A$x

B10

C==

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using x without $ which compares string 'x' not the variable value.

Using == which is not for numeric comparison in test.

Use $x to get the value of variable x inside the test brackets.

3fill in blank

hard

Fix the error in the conditional to check if a directory exists.

Bash Scripting

DIR="/home/user"
if [ [1] "$DIR" ]; then
  echo "Directory exists"
fi

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

A-x

B-e

C-d

D-f

Attempts:

3 left

💡 Hint

Common Mistakes

Using -f which checks for regular files, not directories.

Using -e which checks for any file type but not specifically directory.

Use -d to check if the path is a directory.

4fill in blank

hard

Fill both blanks to check if variable num is greater than 5 and print a message.

Bash Scripting

num=7
if [ [1] [2] 5 ]; then
  echo "Greater than five"
fi

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

A$num

B-gt

C-lt

Dnum

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable name without $.

Using -lt which means less than.

Use $num to get the variable value and -gt to check if greater than 5.

5fill in blank

hard

Fill both blanks to create a conditional that checks if a string is empty.

Bash Scripting

str=""
if [ [1] [2] ]; then
  echo "String is empty"
fi

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

A-z

B$str

C""

D-n

Attempts:

3 left

💡 Hint

Common Mistakes

Using -n which checks for non-empty string.

Using str without the leading $.

Use -z $str to test if the string length is zero.