Loops in C Programming Language

Loops in C Programming Language

• 1.
  Prepared By Mahantesh S.Devoor
• 2.
  Content  Objective  Introduction Typesof looping while do-while for  Assessment metric Conclusion References
• 3.
  Course Objective  Understandthe basic terminology used in computer programming  It stresses the strengths of C, which provide students with the means of writing efficient, maintainable, and portable code.  write, compile and debug programs in C language.  Increase the ability to learn new programming languages OBJECTIVES
• 4.
  Topic Objective  Understandthe basics of looping.  To use the while, do-while and for repetition statement to execute statements in a program repeatedly.
• 5.
  INTRODUCTION  Statements ina program are executed one after the other ex: statement 1; statement 2; : statement n;  Sometimes, the user want to execute a set of statements repeatedly.
• 6.
   Loop statementsare used to repeat the execution of statement or blocks. Iteration of a loop: the number of times the body of loop is executed.  Two types of loop structure are: Pretest : Entry - controlled loop Posttest : Exit – controlled loop
• 7.
  Pretest Vs. Posttest Pretest: Condition is tested before each iteration to check if loops should occur. Posttest : Condition is tested after each iteration to check if loop should continue (at least a single iteration occurs). Conditio n Evaluate d Statements false true Conditio n Evaluate d Statements true false
• 8.
  TYPES OF LOOP while loop  do-while loop  for loop
• 9.
  while Loop  Ithas a loop condition only that is tested before each iteration to decide whether to continue or terminate the loop.  The body of a while loop will execute zero or more times Syntax: while (<condition>){ <statement/block>; }
• 10.
  Example : int i=0; while(i<3){ printf(“Hellon”); i++; } Output: Hello Hello Hello Conditio n Evaluate d Statements true false Flowdiagram
• 11.
  do…while Loop  Dowhile has a loop condition only that is tested after each iteration to decide whether to continue with next iteration or terminate the loop. Syntax: do{ <statement/block>; }while(condition);
• 12.
  Example: int i=0; do{ Printf (“Hellon”); i++; }while (i<3); Output: Hello Hello Hello Conditio n Evaluate d Statements true false Flow diagram
• 13.
  for Loop for loophas three parts:  Initializer is executed at start of loop.  Loop condition is tested before iteration to decide whether to continue or terminate the loop.  Increment is executed at the end of each loop iteration.
• 14.
  Syntax: for( [initialize]; [condition];[incrementor] ) { <statement/block>; } Conditio n Evaluate d initialization Statements increament true false Flow diagram
• 15.
  Example: for(i=0; i<3; i++) { printf(“Hellon”); } Output: Hello Hello Hello
• 16.
  ASSESSMENT METRIC  Whatis looping? List the types of looping.  Explain the while loop with an example.  Give the difference between while and do-while loops  Explain the syntax of for loop with an example  List out the difference between while and for loop. And also explain the do-while loop.
• 17.
  CONCLUSION  Importance ofloops in any programming language is immense, they allow us to reduce the number of lines in a code, making our code more readable and efficient.
• 18.
  REFERENCES [1]. E. Balaguruswamy,“Programming in ANSI C”, Third edition, Tata McGraw Hill Publications, 2002. [2]. P. B. Kotur, “Computer Concepts and C programming”, Kindle Edition, Sapna Book House, Bangalore, 2009.