# A

- [A\* search algorithm](/sidef-lang/programming_tasks/a/a-_search_algorithm.md)
- [A B](/sidef-lang/programming_tasks/a/a_b.md)
- [ABC problem](/sidef-lang/programming_tasks/a/abc_problem.md)
- [Abstract type](/sidef-lang/programming_tasks/a/abstract_type.md)
- [Abundant deficient and perfect number classifications](/sidef-lang/programming_tasks/a/abundant_deficient_and_perfect_number_classifications.md)
- [Abundant odd numbers](/sidef-lang/programming_tasks/a/abundant_odd_numbers.md)
- [Accumulator factory](/sidef-lang/programming_tasks/a/accumulator_factory.md)
- [Achilles numbers](/sidef-lang/programming_tasks/a/achilles_numbers.md)
- [Ackermann function](/sidef-lang/programming_tasks/a/ackermann_function.md)
- [Add a variable to a class instance at runtime](/sidef-lang/programming_tasks/a/add_a_variable_to_a_class_instance_at_runtime.md)
- [Additive primes](/sidef-lang/programming_tasks/a/additive_primes.md)
- [Address of a variable](/sidef-lang/programming_tasks/a/address_of_a_variable.md)
- [AKS test for primes](/sidef-lang/programming_tasks/a/aks_test_for_primes.md)
- [Align columns](/sidef-lang/programming_tasks/a/align_columns.md)
- [Almkvist-Giullera formula for pi](/sidef-lang/programming_tasks/a/almkvist-giullera_formula_for_pi.md)
- [Almost prime](/sidef-lang/programming_tasks/a/almost_prime.md)
- [Amicable pairs](/sidef-lang/programming_tasks/a/amicable_pairs.md)
- [Anadromes](/sidef-lang/programming_tasks/a/anadromes.md)
- [Anagrams](/sidef-lang/programming_tasks/a/anagrams.md)
- [Deranged anagrams](/sidef-lang/programming_tasks/a/anagrams/deranged_anagrams.md)
- [Anaprimes](/sidef-lang/programming_tasks/a/anaprimes.md)
- [Angle difference between two bearings](/sidef-lang/programming_tasks/a/angle_difference_between_two_bearings.md)
- [Animate a pendulum](/sidef-lang/programming_tasks/a/animate_a_pendulum.md)
- [Anonymous recursion](/sidef-lang/programming_tasks/a/anonymous_recursion.md)
- [Anti-primes](/sidef-lang/programming_tasks/a/anti-primes.md)
- [Apéry's constant](/sidef-lang/programming_tasks/a/aperys_constant.md)
- [Append a record to the end of a text file](/sidef-lang/programming_tasks/a/append_a_record_to_the_end_of_a_text_file.md)
- [Append numbers at same position in strings](/sidef-lang/programming_tasks/a/append_numbers_at_same_position_in_strings.md)
- [Apply a callback to an array](/sidef-lang/programming_tasks/a/apply_a_callback_to_an_array.md)
- [Apply a digital filter direct form II transposed](/sidef-lang/programming_tasks/a/apply_a_digital_filter_direct_form_ii_transposed.md)
- [Approximate equality](/sidef-lang/programming_tasks/a/approximate_equality.md)
- [Arbitrary-precision integers included](/sidef-lang/programming_tasks/a/arbitrary-precision_integers_included.md)
- [Archimedean spiral](/sidef-lang/programming_tasks/a/archimedean_spiral.md)
- [Arithmetic](/sidef-lang/programming_tasks/a/arithmetic.md)
- [Complex](/sidef-lang/programming_tasks/a/arithmetic/complex.md)
- [Integer](/sidef-lang/programming_tasks/a/arithmetic/integer.md)
- [Rational](/sidef-lang/programming_tasks/a/arithmetic/rational.md)
- [Arithmetic-geometric mean](/sidef-lang/programming_tasks/a/arithmetic-geometric_mean.md)
- [Calculate Pi](/sidef-lang/programming_tasks/a/arithmetic-geometric_mean/calculate_pi.md)
- [Arithmetic coding](/sidef-lang/programming_tasks/a/arithmetic-coding.md)
- [As a generalized change of radix](/sidef-lang/programming_tasks/a/arithmetic-coding/as_a_generalized_change_of_radix.md)
- [Arithmetic derivative](/sidef-lang/programming_tasks/a/arithmetic_derivative.md)
- [Arithmetic evaluation](/sidef-lang/programming_tasks/a/arithmetic_evaluation.md)
- [Arithmetic numbers](/sidef-lang/programming_tasks/a/arithmetic_numbers.md)
- [Array concatenation](/sidef-lang/programming_tasks/a/array_concatenation.md)
- [Array length](/sidef-lang/programming_tasks/a/array_length.md)
- [Array search](/sidef-lang/programming_tasks/a/array_search.md)
- [Arrays](/sidef-lang/programming_tasks/a/arrays.md)
- [Ascending primes](/sidef-lang/programming_tasks/a/ascending_primes.md)
- [Assertions](/sidef-lang/programming_tasks/a/assertions.md)
- [Associative array](/sidef-lang/programming_tasks/a/associative-array.md)
- [Creation](/sidef-lang/programming_tasks/a/associative-array/creation.md)
- [Iteration](/sidef-lang/programming_tasks/a/associative-array/iteration.md)
- [Attractive numbers](/sidef-lang/programming_tasks/a/attractive_numbers.md)
- [Audio alarm](/sidef-lang/programming_tasks/a/audio_alarm.md)
- [Audio frequency generator](/sidef-lang/programming_tasks/a/audio_frequency_generator.md)
- [Average loop length](/sidef-lang/programming_tasks/a/average_loop_length.md)
- [Averages](/sidef-lang/programming_tasks/a/averages.md)
- [Arithmetic mean](/sidef-lang/programming_tasks/a/averages/arithmetic_mean.md)
- [Mean angle](/sidef-lang/programming_tasks/a/averages/mean_angle.md)
- [Mean time of day](/sidef-lang/programming_tasks/a/averages/mean_time_of_day.md)
- [Median](/sidef-lang/programming_tasks/a/averages/median.md)
- [Mode](/sidef-lang/programming_tasks/a/averages/mode.md)
- [Pythagorean means](/sidef-lang/programming_tasks/a/averages/pythagorean_means.md)
- [Root mean square](/sidef-lang/programming_tasks/a/averages/root_mean_square.md)
- [Simple moving average](/sidef-lang/programming_tasks/a/averages/simple_moving_average.md)
- [AVL tree](/sidef-lang/programming_tasks/a/avl_tree.md)
