# R

- [Radical of an integer](/sidef-lang/programming_tasks/r/radical_of_an_integer.md)
- [Ramanujan's constant](/sidef-lang/programming_tasks/r/ramanujans_constant.md)
- [Ramanujan primes](/sidef-lang/programming_tasks/r/ramanujan-primes.md)
- [Twins](/sidef-lang/programming_tasks/r/ramanujan-primes/twins.md)
- [Ramer-Douglas-Peucker line simplification](/sidef-lang/programming_tasks/r/ramer-douglas-peucker_line_simplification.md)
- [Ramsey's theorem](/sidef-lang/programming_tasks/r/ramseys_theorem.md)
- [Random number generator device](/sidef-lang/programming_tasks/r/random_number_generator_device.md)
- [Random number generator included](/sidef-lang/programming_tasks/r/random_number_generator_included.md)
- [Random numbers](/sidef-lang/programming_tasks/r/random_numbers.md)
- [Range expansion](/sidef-lang/programming_tasks/r/range_expansion.md)
- [Ranking methods](/sidef-lang/programming_tasks/r/ranking_methods.md)
- [Rate counter](/sidef-lang/programming_tasks/r/rate_counter.md)
- [Read a configuration file](/sidef-lang/programming_tasks/r/read_a_configuration_file.md)
- [Read a file character by character](/sidef-lang/programming_tasks/r/read-a-file-character-by-character.md)
- [UTF8](/sidef-lang/programming_tasks/r/read-a-file-character-by-character/utf8.md)
- [Read a file line by line](/sidef-lang/programming_tasks/r/read_a_file_line_by_line.md)
- [Read a specific line from a file](/sidef-lang/programming_tasks/r/read_a_specific_line_from_a_file.md)
- [Read entire file](/sidef-lang/programming_tasks/r/read_entire_file.md)
- [Readline interface](/sidef-lang/programming_tasks/r/readline_interface.md)
- [Real constants and functions](/sidef-lang/programming_tasks/r/real_constants_and_functions.md)
- [Recaman's sequence](/sidef-lang/programming_tasks/r/recamans_sequence.md)
- [Reduced row echelon form](/sidef-lang/programming_tasks/r/reduced_row_echelon_form.md)
- [Reflection](/sidef-lang/programming_tasks/r/reflection.md)
- [List methods](/sidef-lang/programming_tasks/r/reflection/list_methods.md)
- [Regular expressions](/sidef-lang/programming_tasks/r/regular_expressions.md)
- [Remove duplicate elements](/sidef-lang/programming_tasks/r/remove_duplicate_elements.md)
- [Remove lines from a file](/sidef-lang/programming_tasks/r/remove_lines_from_a_file.md)
- [Rename a file](/sidef-lang/programming_tasks/r/rename_a_file.md)
- [Rep-string](/sidef-lang/programming_tasks/r/rep-string.md)
- [Repeat](/sidef-lang/programming_tasks/r/repeat.md)
- [Repeat a string](/sidef-lang/programming_tasks/r/repeat_a_string.md)
- [Repunit primes](/sidef-lang/programming_tasks/r/repunit_primes.md)
- [Resistor mesh](/sidef-lang/programming_tasks/r/resistor_mesh.md)
- [Respond to an unknown method call](/sidef-lang/programming_tasks/r/respond_to_an_unknown_method_call.md)
- [Return multiple values](/sidef-lang/programming_tasks/r/return_multiple_values.md)
- [Reverse a string](/sidef-lang/programming_tasks/r/reverse_a_string.md)
- [Reverse the gender of a string](/sidef-lang/programming_tasks/r/reverse_the_gender_of_a_string.md)
- [Reverse words in a string](/sidef-lang/programming_tasks/r/reverse_words_in_a_string.md)
- [Rhonda numbers](/sidef-lang/programming_tasks/r/rhonda_numbers.md)
- [Rice coding](/sidef-lang/programming_tasks/r/rice_coding.md)
- [Riordan numbers](/sidef-lang/programming_tasks/r/riordan_numbers.md)
- [Rock-paper-scissors](/sidef-lang/programming_tasks/r/rock-paper-scissors.md)
- [Roman numerals](/sidef-lang/programming_tasks/r/roman-numerals.md)
- [Decode](/sidef-lang/programming_tasks/r/roman-numerals/decode.md)
- [Encode](/sidef-lang/programming_tasks/r/roman-numerals/encode.md)
- [Roots of a function](/sidef-lang/programming_tasks/r/roots_of_a_function.md)
- [Roots of a quadratic function](/sidef-lang/programming_tasks/r/roots_of_a_quadratic_function.md)
- [Roots of unity](/sidef-lang/programming_tasks/r/roots_of_unity.md)
- [Rosetta Code](/sidef-lang/programming_tasks/r/rosetta-code.md)
- [Count examples](/sidef-lang/programming_tasks/r/rosetta-code/count_examples.md)
- [Fix code tags](/sidef-lang/programming_tasks/r/rosetta-code/fix_code_tags.md)
- [Rank languages by popularity](/sidef-lang/programming_tasks/r/rosetta-code/rank_languages_by_popularity.md)
- [Rot-13](/sidef-lang/programming_tasks/r/rot-13.md)
- [RSA code](/sidef-lang/programming_tasks/r/rsa_code.md)
- [Run-length encoding](/sidef-lang/programming_tasks/r/run-length_encoding.md)
- [Run as a daemon or service](/sidef-lang/programming_tasks/r/run_as_a_daemon_or_service.md)
- [Runge-Kutta method](/sidef-lang/programming_tasks/r/runge-kutta_method.md)
- [Runtime evaluation](/sidef-lang/programming_tasks/r/runtime_evaluation.md)
- [In an environment](/sidef-lang/programming_tasks/r/runtime_evaluation/in_an_environment.md)
- [Ruth-Aaron numbers](/sidef-lang/programming_tasks/r/ruth-aaron_numbers.md)