Java programming-Operators
Description
Aprogramming language uses control statements to cause the flow of execution
to advance and branch based on changes to the state of a program. Java’s program
control statements can be put into the following categories: selection, iteration,
and jump. Selection statements allow your program to choose different paths of execution
based upon the outcome of an expression or the state of a variable. Iteration statements
enable program execution to repeat one or more statements (that is, iteration statements
form loops). Jump statements allow your program to execute in a nonlinear fashion. All
of Java’s control statements are examined here.
If you know C/C++/C#, then Java’s control statements will be familiar territory. In fact,
Java’s control statements are nearly identical to those in those languages. However,
there are a few differences—especially in the break and continue statements.
Presentation Transcript
Java ProgrammingControl Structures : Java ProgrammingControl Structures By
Adepu Ravi Krishna
Selection Statements : Selection Statements if statement ex) if (A>B) { System.out.println(“A>B”); }
if…else statement ex) if (A>B) { System.out.println(“A>B”); } else { System.out.println(“A<=B”); }
switch Statement ex) switch (A) { case 1: { System.out.println(“A=1”); break; } case 2: { System.out.println(“A=2”); break; } … default: { System.out.println(“A Undefined”); } }
Repetitions(while, do while, and for) : Repetitions(while, do while, and for) An example adding all numbers between 1 to 100
Using While: // Variable Declaration & Initialization int sum = 0; int count = 0; // Processing while (count <= 1000) { sum = sum + count; count = count +1; //same as count++ } // Output System.out.println(“Sum: “ + sum);
Repetitions(while, do while, and for) : Repetitions(while, do while, and for) Using do-while: // Variable Declaration & Initialization int sum =0; int count =0; // Processing do { sum = sum + count; count = count +1; //same as count++ } while (count <=1000);
Using for: // Variable Declaration & Initialization int sum =0; // Processing for (int count =0; count <= 100; count++) { sum = sum +count; }
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