Introduction to basic programming repetition
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This document discusses basic programming concepts including sequence, selection, and repetition structures. It provides examples of how to represent these concepts using flowcharts. Sequence involves executing steps sequentially. Selection determines which steps execute based on a condition. Repetition allows steps to execute repeatedly as long as a condition is met. It discusses pre-test and post-test repetition loops. The document ends with assignment problems applying these concepts.
![This construct is often referred to as an unguarded loop. Variables (in memory):Num [ 4 ]Result [ ]Count [ ]Input:Num <- 4Enter a Number => 4Count = 44 > 0 ? => YESCount = 33 > 0 ? => YESCount = 22 > 0 ? => YESCount = 11 > 0 ? => YESCount = 00 > 0 ? => NOExample: What is the output of the following flowchart when the input is Num= 4Variables (in memory):Num [ 4 ]Result [ 0 ]Count [ 4 ]Variables (in memory):Num [ 4 ]Result [ 7 ] 4 + 3Count [ 2 ] 3 - 1Variables (in memory):Num [ 4 ]Result [ 9 ] 7 + 2Count [ 1 ] 2 - 1Variables (in memory):Num [ ]Result [ ]Count [ ]Variables (in memory):Num [ 4 ]Result [ 10] 9 + 1Count [ 0 ] 1 - 1Variables (in memory):Num [ 4 ]Result [ 4 ] 0 + 4Count [ 3 ] 4 - 1Count: 4Count: 3Count: 2Count: 1Count: 0Result: 10](https://image.slidesharecdn.com/introductiontobasicprogrammingrepetition-110707094858-phpapp02/85/Introduction-to-basic-programming-repetition-12-320.jpg)
Introduction to basic programming repetition
- 1. Introduction to BASIC ProgrammingRepetitionFlowchart
- 3. SEQUENCEIn a computer program or an algorithm, sequence involves simple steps which are to be executed one after the other.
- 4. Make a Flowchart to add two numbers and print the result.STARTS=0: n1=0: n2=0n1, n2S= n1+n2Print SSTOP
- 6. SELECTIONSelection is used in a computer program or algorithm to determine which particular step or set of steps is to be executed
- 7. ExampleCompute the sum of x and y if x is greater than y, other wise print d as their difference.Draw a flowchart to find the largest of three numbers A, B, and C.
- 8. Repetition
- 9. RepetitionRepetition allows for a portion of an algorithm or computer program to be done any number of times dependent on some condition being met. An occurrence of repetition is usually known as a loop.Thebody of the loop is executed repeatedly while the termination condition is true.
- 10. Repetition (Pre-Test Structure)A pre-tested loop is so named because the condition has to be met atthe very beginning of the loop. This construct is often called a guarded loop.
- 11. Repetition (Post-Test Structure)A post-tested loop executes the body of the loop before testing the termination condition.
- 12. This construct is often referred to as an unguarded loop. Variables (in memory):Num [ 4 ]Result [ ]Count [ ]Input:Num <- 4Enter a Number => 4Count = 44 > 0 ? => YESCount = 33 > 0 ? => YESCount = 22 > 0 ? => YESCount = 11 > 0 ? => YESCount = 00 > 0 ? => NOExample: What is the output of the following flowchart when the input is Num= 4Variables (in memory):Num [ 4 ]Result [ 0 ]Count [ 4 ]Variables (in memory):Num [ 4 ]Result [ 7 ] 4 + 3Count [ 2 ] 3 - 1Variables (in memory):Num [ 4 ]Result [ 9 ] 7 + 2Count [ 1 ] 2 - 1Variables (in memory):Num [ ]Result [ ]Count [ ]Variables (in memory):Num [ 4 ]Result [ 10] 9 + 1Count [ 0 ] 1 - 1Variables (in memory):Num [ 4 ]Result [ 4 ] 0 + 4Count [ 3 ] 4 - 1Count: 4Count: 3Count: 2Count: 1Count: 0Result: 10
- 13. Assignment
- 14. Review for the Long Quiz #3
- 15. Selection (Structure)Determine if the input age is qualified to vote or not. If qualified, display “Qualified to vote!” if not, display “Too young!”Given a number, print the message “Positive”, “Negative” or “Neither”
- 16. 3. The V. Mapa High School is accepting freshmen who are not more than 15 years old. Given the students’ name and age, print “ACCEPTED” if it meets the ages Requirement otherwise print “Sorry”
- 17. 4. Due to your poor results in the examination, I decided to increase each one of you by 5 points. Input your grade and print the new grade. If the original grade exceeds 90, then it remains as is.