Unit 3 Lesson 3-4 Hacks and Notes

• Notes:
• Hacks:
• 3.3
• 3.4

Notes:

• three parts of algorithm
  • sequencing
  • selection
  • iteration
• arithmetic operations
  • addition
  • sbtraction
  • multiplication
  • division
  • modulus
• strings
  • ordered sequences of characters
  • some procedures may exist that can be used with strings
  • each language has its own procedures, methods, and functions

Hacks:

3.3

• sequencing:

1. Set item to number to search for.
2. Get next number in the list.
3. If number = item, display "item found"
4. If there are more numbers in the list, go back to Step 2.
5. Display "item not found".

• selection:

1. If number = item, display "item found"

• iteration:

1. If there are more numbers in the list, go back to Step 2.

Aritmetic Expression:

num1 = 5
num2 = num1 * 3
num3 = num2 / num1 * (9 % 2) * 4
result = (num3 % num1 + num2) % num3 * 3 / 5

answer is 3

Crossword Puzzle: 3 across: sequence 1 down: iteration 2 down: selection

3.4

Challenge Problem:

string1 = "degree"
string2 = " passenger"
FinalString = string1 + string2
print(FinalString[2:9])
print(len(FinalString))
print(len(FinalString[2:9]))

gree pa
16
7

Quiz: