Prints out all the tasks inside the list
Format: list
Adds a todo task to the task list
Format: todo [TASK]
Example: todo Do laundry
Adds a deadline task to the task list
Date must be in the yyyy-mm-dd format, otherwise it won't be inputted
Format: deadline [TASK] /by [DATE]
Example: deadline Do CS2113 project /by 2024-03-08
Adds an event task to the task list
Format: event [TASK] /from [START DATE] /to [END DATE]
Example: event MCDonald's part time work /from Monday /to Friday
Deletes a particular task from the task list
Only a valid integer can be inputted after the delete command
Format: delete [INDEX]
Example: delete 1
Sets a particular task from the task list as done
Only a valid integer can be inputted after the mark command
Format: mark [INDEX]
Example: mark 2
Sets a particular task from the task list as not done
Only a valid integer can be inputted after the mark command
Format: unmark [INDEX]
Example: unmark 3
Finds all tasks that contains the inputted keyword from the task list
Format: find [KEYWORD]
Example: find project
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