What does a computer do?
It performs calculations
A billion calculation per second
It remembers result
What kind of calculation?
Built-in to the language
Ones that you define as thr programmer
Computers only knows what you tell them
TYPES OF KNOWLEDGE
Declarative knowledge
It is a stat,emt of fact
Imperative knowledge
It is a recipe or how to?
It is the sequence of steps EXAMPLE
1,Sign up for a give away
2,Person chooses a random no. b/w 1 and N
3,Person finds the number and wins
WHAT IS A RECIPE?
1,Sequence of steps
2,Flow of control process that specifies when each step is excuted
3,A means of determining when to stop
THERE ARE 2 TYPES OF COMPUTERS
1,Fixed programs
For example a calcutor it can only perform one task
2,Stored program
Machine stores adn executes instructions
A basic machine architecture consists of memory,contro unit and ARU[Arithmetic Logic Unit]
Memory stores the actual data and the sequence The control unit is the program counter
ARU checks that whether the instruction is possible to perform
If the task is poosible then it infroms the control unit which increases the number by 1 and moves on to the next step A instruction might consist of a test,the test could be that it would check that whether is the value is greater or equal to value provided
The test would return true or false If the test passes then it moves onto the next step
If the test failes then it would go back to the first step STORED PROGRAM COMPUTER Sequence of instruction stored inside computer built for a predefined set of primitive instructions
1,Arthmetic and logic
2,Simple tests
3,Moving data
CREATING RECIPES
A programming