> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/d.md).

# D

- [Damm algorithm](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/damm_algorithm.md)
- [Date format](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/date_format.md)
- [Date manipulation](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/date_manipulation.md)
- [Day of the week](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/day_of_the_week.md)
- [Days between dates](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/days_between_dates.md)
- [De Polignac numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/de_polignac_numbers.md)
- [Death Star](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/death_star.md)
- [Deceptive numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/deceptive_numbers.md)
- [Decimal floating point number to binary](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/decimal_floating_point_number_to_binary.md)
- [Decision tables](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/decision_tables.md)
- [Decorate-sort-undecorate idiom](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/decorate-sort-undecorate_idiom.md)
- [Deepcopy](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/deepcopy.md)
- [Define a primitive data type](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/define_a_primitive_data_type.md)
- [Delegates](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/delegates.md)
- [Delete a file](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/delete_a_file.md)
- [Deming's funnel](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/demings_funnel.md)
- [Department numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/department_numbers.md)
- [Descending primes](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/descending_primes.md)
- [Detect division by zero](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/detect_division_by_zero.md)
- [Determinant and permanent](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determinant_and_permanent.md)
- [Determine if a string has all the same characters](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determine_if_a_string_has_all_the_same_characters.md)
- [Determine if a string has all unique characters](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determine_if_a_string_has_all_unique_characters.md)
- [Determine if a string is collapsible](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determine_if_a_string_is_collapsible.md)
- [Determine if a string is numeric](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determine_if_a_string_is_numeric.md)
- [Determine if a string is squeezable](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determine_if_a_string_is_squeezable.md)
- [Determine if only one instance is running](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/determine_if_only_one_instance_is_running.md)
- [Dice game probabilities](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dice_game_probabilities.md)
- [Digit fifth powers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/digit_fifth_powers.md)
- [Digital root](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/digital_root.md)
- [Multiplicative digital root](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/digital_root/multiplicative_digital_root.md)
- [Dijkstra's algorithm](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dijkstras_algorithm.md)
- [Dinesman's multiple-dwelling problem](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dinesmans_multiple-dwelling_problem.md)
- [Disarium numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/disarium_numbers.md)
- [Discordian date](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/discordian_date.md)
- [Display a linear combination](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/display_a_linear_combination.md)
- [Distinct palindromes within decimal numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/distinct_palindromes_within_decimal_numbers.md)
- [Distinct power numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/distinct_power_numbers.md)
- [Distribution of 0 digits in factorial series](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/distribution_of_0_digits_in_factorial_series.md)
- [Diversity prediction theorem](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/diversity_prediction_theorem.md)
- [DNS query](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dns_query.md)
- [Dot product](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dot_product.md)
- [Double Twin Primes](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/double_twin_primes.md)
- [Doubly-linked list](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/doubly-linked-list.md)
- [Element definition](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/doubly-linked-list/element_definition.md)
- [Dragon curve](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dragon_curve.md)
- [Draw a clock](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/draw_a_clock.md)
- [Draw a cuboid](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/draw_a_cuboid.md)
- [Draw a sphere](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/draw_a_sphere.md)
- [Duffinian numbers](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/duffinian_numbers.md)
- [Dynamic variable names](https://trizen.gitbook.io/sidef-lang/programming_tasks/d/dynamic_variable_names.md)