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In this post, we're gonna learn about Switch statement in

  • Python,
  • C#,
  • Java.

Before we getting started, let's first know more about Switch statement in Programming Languages

What is a Switch statement?

  • Switch statement is a multiway branch statement.
  • Switch statement is a selection statement that chooses one section to execute from its cases that match the expression.
  • Switch statement is used as an alternative of if-else statement.
  • You can have any number of case statements within a switch.

Switch statement in C#

  • The switch expression is evaluated once.
  • Only one switch section in a switch statement executes.
  • The data type of the variable in the switch and value of a case must be of the same type.
  • The break in switch statement is used to terminate the current sequence.
    • C# doesn't allow execution to continue from one switch section to the next, it must contain a jump statement.
  • When the expression matches the case value the block of code will be executed. 

Switch Syntax in C#

switch(expression)
{
  case x:
    // code block
    break;
  case y:
   // code block
    break;   
    .
    .
   case N:
    // code block
    break;
  default:
    // code block
    break;
}

Example of the switch statement in C#

Description: switch in c#

Switch statement in Python

  • Python does not have a switch or case statement.
  • To implement switch statement in Python is to use the built-in dictionary mappings.
  • It can be implemented using an if-elif-else statement.

Example using a dictionary to implement switch statement

Description: python switch using dictionary

Switch statement in Java

  • switch statement is a selection mechanism used to allow the value of an expression to change the flow of the program execution.
  • Duplicate cases value is not allowed.
  • The data type of the variable in the switch and value of a case must be of the same type.
  • The break in switch statement is used to terminate the current sequence.
  • Unlike the C#,the break statement is optional if not found the execution will continue to the next case;

 Example of switch statement in java

 switch in java

Here is an example that shows that the break statement is optional to use

break in java is optional


See Also


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