Numeric Functions

Let us understand some of the common numeric functions we use with Python as programming language.

  • We have functions even for standard operators such as +, -, *, / under a library called as operator. However, we use operators more often than functions.

    • add for +

    • sub for -

    • mul for *

    • truediv for /

  • We can use pow for getting power value.

  • We also have math library for some advanced mathematical operations.

  • Also, we have functions such as min, max to get minimum and maximum of the numbers passed.

4 + 5

9

5 % 4

1

import operator
from operator import add, sub, mul, truediv

add?

Docstring: add(a, b) -- Same as a + b.
Type:      builtin_function_or_method

add(4, 5)

9

truediv(4, 5)

0.8

from operator import mod

mod(5, 4)

1

pow(2, 3) # This is also available under math library

8

pow?

Signature: pow(x, y, z=None, /)
Docstring:
Equivalent to x**y (with two arguments) or x**y % z (with three arguments)

Some types, such as ints, are able to use a more efficient algorithm when
invoked using the three argument form.
Type:      builtin_function_or_method

import math

math.pow?

Docstring:
pow(x, y)

Return x**y (x to the power of y).
Type:      builtin_function_or_method

math.ceil(4.4)

5

math.floor(4.7)

4

round(4.4)

4

round(4.7)

5

round(4.662, 2)

4.66

math.sqrt(2)

1.4142135623730951

math.pow(2, 3)

8.0

min?

Docstring:
min(iterable, *[, default=obj, key=func]) -> value
min(arg1, arg2, *args, *[, key=func]) -> value

With a single iterable argument, return its smallest item. The
default keyword-only argument specifies an object to return if
the provided iterable is empty.
With two or more arguments, return the smallest argument.
Type:      builtin_function_or_method

min(2, 3)

2

max(2, 3, 5, 1)

5
Overview of Pre-defined Functions Overview of Strings