Learning about Programming Languages By Mike and Sean

Learning about Programming Languages By: Mike and Sean

Brief Histories – C is a general-purpose computer programming language originally developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories to implement the Unix operating system. It is not an objected oriented language. – Java is a programming language originally developed by Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. Java is object oriented. – Python was made in the late 1980 s by Guido van Rossum in the Netherlands as a successor to the ABC programming language. Python is an object oriented language.

Concepts • Aspects all programming languages share: – Booleans – Primitive data type have one of two values: True or False if(x!=0) { printf(“True”); } else { printf(“False”): }

…Concepts Continued – Loops – Series of commands repeated until condition becomes false. – Condition – A Boolean expression used to control loops. i=0; while(i<5) { printf(“Hello World!n”); i++; }

More Concepts – Comments – Notes in the program for programmers, not shown in program. /* This will not be printed */ – Nesting – Putting one thing inside something else, such as a nested loop. i=0, j; while(i<5) { for(j=0; j<3; j++) { printf(“Hello World!n”); } i++; }

Project Progress • We have learned the second of three example we will use to illustrate the differences between the languages— String arrays. • We have started to learn about Object oriented vs. non object orientated languages and will explain briefly the differences and meanings of these during the next presentation.

Ex. Of String Arrays C • Python name = raw_input(“What is your name? “) Print name (Don’t have to worry about overloading the memory) char word[10]; int i = 0; scanf("%s", word ); printf("%sn", word); return 0; } (This is only one way to do it in C, but you have to worry about overloading the memory, using the other way, you have to remember ‘’ at the end of every string. )

Ex. Of String Arrays cont • Java class String. Character { static String[] roseindia={"chanan", "tapan", "Amar", "santosh", "deepak"}; public static void main(String args[]){ for(int i=0; i<5; i++){ System. out. println(roseindia[i]); } } }

References • Natural programming languages and environments Source Communications of the ACM archive Volume 47 , Issue 9 (September 2004) table of contents End-user development: tools that empower users to create their own software solutions • SPECIAL ISSUE: End-user development table of contents • • • Pages: 47 - 52 Year of Publication: 2004 ISSN: 0001 -0782 Authors Brad A. Myers John F. Pane Andy Ko Publisher ACM New York, NY, USA Bibliometrics Downloads (6 Weeks): 19, Downloads (12 Months): 167, Citation Count: 11