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Python - Mathematical Functions - Hexadecimal, Binary, Exponential, Absolute, Round

🐍 Some mathematical functions are in-built in python. Here are some of them.

Convert Decimal to Hexadecimal

hex(246)
Output:
'0xf6'
hex(512)
Output:
'0x200'

0x is prefix to all hexadecimal numbers in output. The number after 0x is the hexadecimal value.

Convert Decimal to Binary

bin(1234)
Output:
'0b10011010010'
bin(246)
Output:
'0b11110110'
bin(512)
Output:
'0b1000000000'

Exponential Function

pow() function is similar to num1**num2, but it comes useful when you want to execute (num1**num2)%num3. Passing three arguments to pow(), does this.
pow(3,4)
Output:
81
This works just like 3**4
pow(3,4,5)
Output:
1
But this, works equivalent to (3**4)%5. Either of the two ways can be used. At this point I feel (3**4)%5 is better, as anybody reading the code will understand what is being done immediately. While with pow(2,3,4), the person may have to refer to documentation to understand how this function works.

Absolute Value

The function abs() is used to find the absolute value, i.e. it removes the negatives, if any and returns the positive number.
abs(-3.14)
Output:
3.14
abs(3.14)
Output:
3.14

Round

The function round() will round a number to a given precision in decimal digits (default 0 digits). It does not convert integers to floats.
round(295,-1)
Output:
300
round(295,0)
Output:
295
round(295,1)
Output:
295
round(3.1415926535,2)
Output:
3.14
round(3.1415)

Output:
3
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