Python · Theory

Python Built-in Functions

Theory

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Python Built-in Functions

Built-in functions ship with Python. You call them without import: print, len, type, range, sum, min, max, sorted, enumerate, zip, input, int, str, list. They keep small scripts consistent. len(names) is the size. names.count("Asha") is how many times Asha appears — different job. Mixing len and count is a classic MCQ fail.

Name eight you actually use. Don’t recite fifty. input() always returns text — wrap with int() if you need a number. sorted(a) returns a new list; a.sort() is a list method, not a built-in that returns the list.

Python Built-in Functions — output — 3 60 30. Three builtins on one list.

Diagram

def square(n):
      return n * n
         │ square(5)
         ▼
        25

Exam tip

len vs count — size vs how many times.

Example

# Built-in functions
nums = [10, 20, 30]
print(len(nums), sum(nums), max(nums))

Python Built-in Functions — output: 3 60 30. Three builtins on one list.

Short notes

DefNo import. print len type range.
Ruleinput() returns str.
Traplen vs count. sorted vs sort.

Python · Theory

Python Built-in Functions

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Theory

43/268

Python Built-in Functions

Python Built-in Functions — output — 3 60 30. Three builtins on one list.

Diagram

def square(n):
      return n * n
         │ square(5)
         ▼
        25

Exam tip

len vs count — size vs how many times.

Example

# Built-in functions
nums = [10, 20, 30]
print(len(nums), sum(nums), max(nums))

Python Built-in Functions — output: 3 60 30. Three builtins on one list.

Short notes

DefNo import. print len type range.
Ruleinput() returns str.
Traplen vs count. sorted vs sort.

Python Built-in Functions

Example

Short notes

Questions

Python Built-in Functions

Example

Short notes

Questions