Lecture Notes on 04 Sep 2009

Learning a new Computer Language

* Write Hello World
    print "Hello World!"

* Characterset

* Variables

* Statement 

* Operators: 
    Arithmetic: +, -, *, /, %, ** 
    Comparison: ==, !=, >, >=, <, <=
    Boolean: not, and, or

* Conditionals: 
    if (cond):
      #  do this
    else:
      # do that

* Loops

* Functions

def main():
  print "Hello World"

main()


* Lists (Arrays)

* Simple Input / Output

  x = input ("Enter a number: ")

  name = raw_input ("Enter your name: ")

Simple implementation of Computer Programs
* Input phase - read data either from the console or from a file

* Computation phase - perform the necessary calculations with the data

* Output phase - write out the data either to the console or to a file