Description
Program Control Statements or Decision Making Statements help to control the processing of code with additional functionality on provision of certain set of conditions/rules.
- Control Statement-Selection
- Control Statement-Loop
Types of Selection Statements:
- If
- If –else statement
- Nested-if statement
- switch
- break
- goto
Syntax
Explanation
Syntax
| Statement | Syntax |
|---|---|
| if | If(true) { //execute the code } |
| if-else | If(true) { //execute the code-1 } else { //execute the code-2 } |
| Nested if | If(true) { //execute the code-1 } Else if(true) { //execute the code-2 } Else { //execute the code-3 } |
| Switch/Break/goto | switch (x) { case “A”: break; Case “B”: Goto case”A” } |
Example
An example of a Selection Statement is shown below.
[csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace SPLessons
{
class Program
{
static void Main(string[] args)
{
char voting;
voting='B';
switch (voting)
{
case 'A':
Console.WriteLine("First:", +voting);
break;
case 'B':
Console.WriteLine("Second" + voting);
break;
case 'C':
Console.WriteLine("third" + voting);
break;
default:
Console.WriteLine("Invalid Option" + voting);
break;
}
Console.ReadLine();
}
}
}
[/csharp]
Output:
Description
Executes statements repeatedly in a sequence until a given/set condition is satisfied.
Loop Statements
- For
- foreach
- do
- while
- continue
- break
Syntax
| Operator | Description | Syntax |
|---|---|---|
| for | Iterates the statement for ‘n’ number of times. | For(datatype variable;variable<number;variable++) |
| foreach | It works similar to for loop but iterates the loop against a value/Object. | For(datatype variable;variable<number;variable++) { //Block of code to execute } |
| do | Executes the statement in the loop once before the condition is tested, and, continues only when the condition is satisfied. | do { //Execute block of code }while(variable |
| While | Executes the statement in loop only when a condition is satisfied. | While(variable<number) { //Execute block of code } |
| continue | It stops the statement execution and allows to check condition again. | for(datatype variable;variable<number;variable++) { //Block of code to execute continue; } |
| break | To stop the execution of the statement. | for(datatype variable;variable<number;variable++) { //Block of code to execute break; } |