Notebook 4: Floating Point

Question 1

ord()

Answer 1

returns the number representing the unicode value of a character

Question 2

isalpha()

Answer 2

returns true if all characters in string are alphabet letters a-z

Question 3

floating point representation

Answer 3

Value=Sign × Significand × Base^Exponent

Question 4

floating point representation - sign

Answer 4

indicates if number is positive or negative

Question 5

floating point representation - significand (Mantissa)

Answer 5

represents the precision of the number

Question 6

floating point representation - base

Answer 6

the base of the number. 10 for regular numbers and 2 for computers usually

Question 7

floating point representation - exponent

Answer 7

determines the scale of the number

Question 8

hex format

Answer 8

a way of representing numbers using a base of 16, or hexadecimal
ex:
‘-0x1.4002000000000p+10’

sign of the number is first
prefix 0x that means it’s hexadecimal notation
1.4002…. is the significand in base-16 (hexadecimal)
p+ means power of 2 and the following number tells us how many places to shift the significand + scales the number

Question 9

strip()

Answer 9

In Python, the strip() method is used to remove leading and trailing characters from a string. By default, it removes whitespace characters (spaces, tabs, newlines, etc.).

Question 10

lstrip / rstrip

Answer 10

In Python, lstrip() and rstrip() are string methods used to remove leading and trailing characters from a string, respectively.

Question 11

list slicing

Answer 11

list_name[start : end : step]