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.
addfor+subfor-mulfor*truedivfor/- We can use
powfor getting power value. - We also have
mathlibrary for some advanced mathematical operations. - Also, we have functions such as
min,maxto get minimum and maximum of the numbers passed.
- We can use
In [1]:
4 + 5
Out[1]:
9
In [2]:
5 % 4
Out[2]:
1
- We can also perform arithmetic operations using operator.
- It have functions such as
add,sub,mulandtruediv.
In [3]:
import operator
from operator import add, sub, mul, truediv
In [4]:
add?
Signature: add(a, b, /) Docstring: Same as a + b. Type: builtin_function_or_method
In [5]:
add(4, 5)
Out[5]:
9
In [6]:
truediv(4, 5)
Out[6]:
0.8
In [7]:
from operator import mod
mod(5, 4)
Out[7]:
1
In [8]:
pow(2, 3) # This is also available under math library
Out[8]:
8
In [9]:
pow?
Signature: pow(base, exp, mod=None) Docstring: Equivalent to base**exp with 2 arguments or base**exp % mod with 3 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
mathprovides several important functions which are useful on regular basis.- Here are some of the important functions from
math.powceil– get next integer to the passed decimal value.floor– get prior integer to the passed decimal value.round– it is not frommathmodule and it is typically used to get prior or next integer. It will give us prior integer if the decimal up to.5. If the decimal is greater than.5, thenroundwill return next integer.
In [10]:
import math
In [11]:
math.pow?
Signature: math.pow(x, y, /) Docstring: Return x**y (x to the power of y). Type: builtin_function_or_method
In [12]:
math.ceil(4.4)
Out[12]:
5
In [13]:
math.floor(4.7)
Out[13]:
4
In [14]:
round(4.4)
Out[14]:
4
In [15]:
round(4.7)
Out[15]:
5
In [16]:
round(4.5)
Out[16]:
4
In [17]:
round(4.662, 2) # You can also round a decimal to desired number of decimal places.
Out[17]:
4.66
In [18]:
math.sqrt(2)
Out[18]:
1.4142135623730951
In [19]:
math.pow(2, 3)
Out[19]:
8.0
- We can use
minto get minimum of passed numbers. You can pass as many numbers as you want.
In [20]:
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
In [21]:
min(2, 3)
Out[21]:
2
- We can use
maxto get maximum of passed numbers. You can pass as many numbers as you want.
In [22]:
max(2, 3, 5, 1)
Out[22]:
5