Numbers and math module
- 2. NUMBERS IN PYTHON • Python supports integers, floating-point numbers and complex numbers. They are defined as int,float and complex classes in Python. • Example: o5 is an integer o5.0 is a floating point o5+4i is a complex number • While integers can be of any length, a floating-point number is accurate only up to 15 decimal places (the 16th place is inaccurate). 10/10/2021 MS.DEEPALI SHINKAR 2
- 3. TYPE() AND ISINSTANCE() • We can use the type() function to know which class a variable or a value belongs to and isinstance() function to check if it belongs to a particular class. 10/10/2021 MS.DEEPALI SHINKAR 3
- 4. DECIMAL : BINARY,OCTAL,HEXADECIMAL • The numbers we deal with every day are of the decimal (base 10) number system. But computer programmers (generally embedded programmers) need to work with binary (base 2), hexadecimal (base 16) and octal (base 8) number systems. • In Python, we can represent these numbers by appropriately placing a prefix before that number. 10/10/2021 MS.DEEPALI SHINKAR 4 Number System Prefix Binary ‘0b’ or ‘0B’ Octal ‘0o’ or ‘0O’ Hexadecimal ‘’0x’ or ‘0X’
- 5. DECIMAL • decimal module is used when we want to carry out decimal calculations. • While floating-point numbers have precision up to 15 decimal places, the decimal module has user-settable precision. • We generally use Decimal in the following cases. • When we are making financial applications that need exact decimal representation. • When we want to control the level of precision required. • When we want to implement the notion of significant decimal places. 10/10/2021 MS.DEEPALI SHINKAR 5
- 6. FRACTIONS • Python provides operations involving fractional numbers through its fractions module. • A fraction has a numerator and a denominator, both of which are integers. This module has support for rational number arithmetic. • Fractions allows us to instantiate with string as well. This is the preferred option when using decimal numbers. 10/10/2021 MS.DEEPALI SHINKAR 6
- 7. PYTHON MATHEMATICS • Python math module is defined as the most famous mathematical functions, which includes trigonometric functions, representation functions, logarithmic functions, etc. • Furthermore, it also defines two mathematical constants, i.e., Pie and Euler number etc. 10/10/2021 MS.DEEPALI SHINKAR 7