1. Computer Science Core Concepts

2. What is Computer Science?
Computer Science is the creation and adaptation of technology

3. What is programming?

4. Instructions for a computer to follow to perform a task
Programming
Instructions for a computer to follow to perform a task

5. What is an algorithm?

6. Algorithms
A process to follow to solve a problem; a set of instructions

7. What is A variable?

8. Variable A symbol or name that represents a value
Can declare, assign or change the value of variables

9. What is Boolean?

10. Boolean
A data type that returns only true or false. It will not return numbers*, words, etc..
True=1
False=0 *the only numbers Boolean will return

11. What is A Comparator?

12. Comparators (aka Logic operators)
Compare two or more
Variables
The result of the
comparison is a
boolean value
Equal to ==
and
Not equal to != or
Greater than
>
not
Greater than or equal to
>=
Less than
<
Less than or equal to
<=

13. Comparators (con’t) x = 10 y = 20
What is the boolean value of the following expressions?
x == y
x != y
x > y
x >= y
x < y
x <= y

14. What is An if-else statement?

15. If-Else Statements
When a comparison is True, then the if- block will be executed. And, if a comparison is False, then the else- block will be executed.

16. If-Else Statements examples
y = 4
What is the boolean value of the following expressions?
if (x > y and y != 5) if (x < y or x >= 5)
print (“Hello!”) print (“Hola!”)
else else
print (“Bye!”) print (“Adios!”)
if ((x-y)==4)
print (“Bonjour!”)
else
print (“Au revoir!”)

17. What is Branching?

18. Branching
A branch is a set of instructions that, when executed, cause the computer to begin execution of a different instruction sequence.
Branching can use if-else or switch statements

19. What is a loop?

20. LOOPS
Series of instructions that is repeated until a given condition is false

21. LOOPS (Types)
for loop: executed at least once, and the number of repetitions is known
while loop: repeatedly executed statement; will be executed 0-infinity times

22. What is iteration?

23. Iteration Iteration is the act of repeating a process
Each time a loop runs, that is one iteration.

24. What is a function?

25. Functions
A small set of instructions that defines how to complete a specific task
The “Add ten to a number” is the function

26. You learned about ... Computer Science Programming Algorithm Variable
Boolean Comparators
If/Else Loops
For Loop While Loop
Iteration Function

27. Review!