RI Y2 CEP Lesson 3 Slides 2020

Lesson 3Hexadecimal . Iterations . Array: list . Useful functionsRandom Number Generator . Charles Babbage

Administrative•Lesson 6: Practical Test 1•Release of CA1 (Project) – Due Lesson 13

Hexadecimal – base 16

How to convert ? ( 16 à 10 )

How to convert ? ( 2 à 16 )

Try . . .•(10101000111)2 to hexadecimal.

format()

ord() , chr() >>> ord(‘A’)>>> 65

Let’s think . . .if True or true: print(‘true!’)if true or True: print(‘true!’)What’s the difference ?

Short-Circuit (Lazy) Evaluation•For logical and, if the first operand evaluates to false, then regardless of the value of the second operand, the expression is false.•For logical or, if the first operand evaluates to true, regardless of the value of the second operand, the expression is true.if n != 0 and 1/n < tolerance:if n != 0: if 1/n < toleranceIn the Python programming language, short-circuit evaluation is used. What if n = 0 ?