Level 1 : What does the len() function in Python return?

Author: KaivalyaG | Tags: function | 1859+ Python FAQs | Share
assert | name-mangling | arithmetic-operation | datetime.date,-datetime.time,-datetime.datetime | string-method | introduction-to-threads | package-management | counter | mutable | binary-operation | logical-operators | bitwise-operator | max-min | complex | class-and-instance-variable | overflow | logical-operator | matplotlib | operator-and | list-slicing | managing-directories-with-os-and-shutil | debugging | collections | decimal | basic | bitwise | list-operation | magic-method | conversion | conditional-statement | loop-control-statements | operator-overloading | nested-loop | precedence | multiple-inheritance | pickling--unpickling | postfix | namedtuple | class | __all__-attribute | dataframe-and-series-objects | random | complex-number | class-and-object | overriding-methods | comment | asyncio | loops | operator-or | match | compute | multiple-inheritance | conditional-statement | print | odd-number | data-type | list-methods-and-slicing | filter | list-vs-tuple | file_handling | operations | gil | math | def | raise-statement | frozenset | data-type | input | multiprocessing | file-handling | dictionary-comprehensions | opening-files-(open()) | creating-custom-modules | strings | error-handling | indentation | namespace | expression | iterator | id-function | counter-function | set-operation | yield | comparison | using-os-and-pathlib-modules | tuple | fabs-function | typeerror | global-keyword | string-manipulation | dictionary-methods | heap-memory | dicts | unit-testing | context-manager | string-slicing | set | round | sets | using-else-and-finally | using-lists-as-stacks | keyword | encoding | tuples | syntaxerror | sum-function | single-inheritance | reading:-read(),-readline(),-readlines() | data-type-conversions | boolean-and-non-boolean | invalid-list | using-join()-and-is_alive()-methods | while-loops | variable | list-comprehensions | creating-and-starting-threads | zip | string | decorator | threading | __init_subclass__ | static-method | functions | statement | string-iteration | data_structure | control-flow | thread-synchronization | working-with-file-paths | data-structure | constructor | benefit | string-slicing | version-check | difference-between-threads-and-processes | generator | advanced-file-operations | deep-copy | floats | dictionary | thread-safe-data-structures-(queue.queue) | virtual-environment | exception | type_conversion | update | thread | global | library | design-principle | slice | shallow-copy | zip-function | sorting | staticmethod | type-conversion | using-the-threading-module | time-series-with-pandas | version | test-discovery | sorting-and-ranking | comprehension | global-variable | precedence-and-associativity | regular-expression | data-structure | regular-expressions | defining-functions | string-formatting | default-arguments | booleans | type-conversion | writing:-write(),-writelines() | arbitrary-arguments-(*args,-**kwargs) | rollback | while-loop | tuple-methods | exponentiation | lambdas | split | init | string-method | tuple-unpacking | mapping-function | operators | polymorphism | built-in-modules | generators | method | list-indexing | attribute | random-function | factorial-function | python-history | lists | append | input-function | installation | indexing | loop-control | center | conditional-statements | membership-operators-(in,-not-in) | identity-operator | scientific-notation | module | formal-and-actual-parameter | interpreter | inheritance | boolean | mathematics | join | loop | datetime | virtual-environment | quantifiers-(*,-+,-?,-{}) | collection | software-design | for | memory | sys-module | python-repl | methods | raise | python_version | numeric | zfill-function | __future__ | data-structures-in-python | oop | recursion | recurssion | encapsulation | array | swapping | working-with-dates-and-times | classes | regex | objects | touples | file | application | key-value-pairs | assignment-operators | escape-operator | operator | list-method | walking-through-directories-using-os.walk() | binary | default-mutable-argument | python-module | iterators | working-with-binary-files-(rb,-wb) | identifier | object-attribute | print-statement | pep | round-function | condition | copy | data-types | min-function | parameter | destructor | list,-set,-and-dictionary-comprehensions | function | higher-order-function | string-methods | data-structures | datatype | syntax-error | control-statement | pass | functional-programming | sum() | parsing-with-strptime | literal-characters-and-special-characters | implementation | multiple-except-blocks | python-django | pseudocode | descriptors | control-flow | iterable | handling-missing-values-(fillna,-dropna) | python-operators | dictionaries | reading-and-writing-files | head-and-tail | goto-function | built-in-function | turtle | call | bitwise-operator | choice | mysql | immutability | sorted | aggregating-data-with-functools.reduce() | working-with-temporary-files-using-tempfile | slicing | matrix | assignment-operator | arithmetic-expression | python-syntax-and-structure | return-statement | anchors-(^,-$) | oops | command-line-parsing | intering | else-statement | sys | exception-handling | built-in | string-concatenation | else | global-variable | inherit | reading-and-writing-large-files-efficiently | operand | class-and-inheritance | python | introduction-to-python | syntax | lambda-function | access-modifier | built-in-function | method-overloading | import-method | docstring | list-mutation | multithreading | syntax-error | asyncio-module | async | using-yield-in-functions | list-comprehension | lambda-functions | class-decorators | integer | directory-operations | boolean-masking | string-formatting | why-use-multiprocessing-over-threading?-(gil) | expand-tab | numpy | input-function | range | integers | list-comprehension | error | list-join | function-argument | identity-operators-(is,-is-not) | pandas | error-handling | generators-in-python | formatting-with-strftime | filtering-and-indexing | while-else-loop | while-and-for-loop | logical-operation | matrix-list-comprehension | memory-management | functional-programming | joining-and-merging-dataframes | logical-operator | min-max-function | lambda | enumerate() | using-map()-for-transformations | feature | function-and-scope | using-assertions-(assertequal,-assertraises) | list | floating-point-precision | format | type-conversion-and-casting | stack | introduction-to-multiprocessing | map-function | indexing:-loc-vs-iloc | identity-operator | exception-handling | filter-function | math-copysign | int | mathematical-function | file-handling | immutable-data-type | with-statement ...