That is it was designed in such a way that complete

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Unformatted text preview: extended in virtually every available BASIC dialect. Today, BASIC has many dialects including BASICA, QBASIC, and Visual Basic. Microsoft's Visual Basic supports object-oriented features and methods. Furthermore, note that although BASIC began as an interpreted language, several new dialects of BASIC have added compilers. Microsoft's Quick BASIC and Visual Basic produce compiled programs. A BASIC program to compute and print the sum of 10 numbers is given in Figure 12.20. It can be observed from this example that a BASIC program is made up of a series of statements. Each statement starts with a statement number and a key word, followed in most cases by some type of action. For example, in the statement, "40 LET S = S + N", 40 is the statement number, LET is the key word, and S = S + N is the action. The first two statements of the program, which are REM statements, are remarks being made for the purpose of explaining or documenting a program step. They have no effect on the program logic. A remark/comment statement must have a line number, the key word REM, and any remark that the programmer wishes to make. In our example, the remark statement was used to name the program. The two LET statements are assignment statements. The READ and PRINT statements read input data and print output result respectively. The FOR and NEXT statements control the loop that is meant for adding the 10 numbers one-by-one. The two DATA statements in the program are used to furnish the input data. The END statement stops the program. 5 REM PROGRAM TO COMPUTE 6 REM THE SUM OF 10 NUMBERS 10 LETS = 0 20 FORI=lTO10 30 READ N 40 LET S = S + N 50 * NEXT I 60 PRINT "THE SUM OF GIVEN NUMBERS : 70 DATA 4, 20, 15, 32, 48 80 DATA 12, 3, 9, 14,44 90 END; Pascal Named after the famous seventeenth-century, French mathematician, Blaise Pascal, this language was first developed in the year 1971 by Professor Nicklaus Wirth of Federal Institute of Technology in Zurich, Switzerland. His main objective was to develop a language that can allow beginners to learn good problem solving and programming practices. To meet this objective, Pascal was developed based on the concepts associated with structured programming. That is, it was d...
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This document was uploaded on 04/07/2014.

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