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Learn how to use the switch statement to execute a block of code among many alternatives in C++. See the syntax, flowchart, and examples of creating a calculator using switch...case.
- C++ Memory Management
C++ allows us to allocate the memory dynamically in run...
- C++ Friend Function
In this tutorial, we will learn to create friend functions...
- Inheritance Types
The obj object of class C is defined in the main()...
- C++ Constructors
C++ Default Constructor. A constructor with no parameters is...
- C++ Objects & Function
In C++ programming, we can pass objects to a function in the...
- C++ Virtual Function
Use of C++ Virtual Functions. Virtual functions are useful...
- C++ Memory Management
- What Is A Switch Statement in C++?
- Rules of The Switch Case Statement in C++
- Working of Switch Statement in C++
- Important Points About Switch Case Statements
- Examples of Switch Statement in C++
- Advantages of Switch Statement in C++
- Disadvantages of Switch Statement in C++
- Conclusion
- FAQs on C++ Switch Statement
The switch statement in C++ is a flow control statement that is used to execute the different blocks of statements based on the value of the given expression. We can create different cases for different values of the switch expression. We can specify any number of cases in the switch statement but the case valuecan only be oftypeint orchar.
There are some rules that we need to follow when using switch statements in C++. They are as follows: 1. The case value must be either int or char type. 2. There can be any number of cases. 3. No duplicate case values are allowed. 4. Each statement of the case can have a break statement. It is optional. 5. The default Statement is also optional.
The working of the switch statement in C is as follows: 1. Step 1:The switch expression is evaluated. 2. Step 2:The evaluated value is then matched against the present case values. 3. Step 3A:If the matching case value is found, that case block is executed. 4. Step 3B:If the matching code is not found, then the default case block is executed if pre...
1. Switch expression should result in aconstant value
If the expression provided in the switch statement does not result in a constant value, it would not be valid. Some valid expressions for switch case will be,
2. Expression must evaluate only int or char type values.
The switch statement can only evaluate the integer or character value. So the switch expression should return the values of type int or char only.
3. Break in switch case
The break keyword is used in the switch case to break out of the switch when encountered. It is used at the end of every case block so that when the matching case is executed, the program control comes out of the loop. The break statement is optional. If omitted, all the cases after the matching case will also be executed.
Example 1: C++ Program to make a Simple Calculator using the switch
Output
Easier to debug and maintain for a large number of conditions.Easier to read than if else if.Switch case can only evaluate int or char type.No support for logical expressions.Have to keep in mind to add a break in every case.In this article, we discussed the switch statement and how we can use it to replace long and complex if else if ladder statements. We also discussed the cases in which we can use the switch statement to make our C++ program more efficient.
1. Define switch in C++.
The switch is a decision-making statement that can execute the different blocks of code based on the value of the expression specified.
2. Which statements are optional in the C++ switch?
The default and break are optional in the switch in C++.
3. What are the differences between switch and if else if ladder in C?
Following are the main differences between switch and if else if ladderin C++:
- 2 min
Learn how to use the switch statement to select one of many code blocks to be executed. See the syntax, the break and default keywords, and an example of calculating the weekday name.
Jun 19, 2024 · A switch statement is associated with multiple case labels whose constant-expression s have the same value after conversions. A switch statement is associated with multiple default labels. Control flow transfer. When the condition of a switch statement yields a (possibly converted) value:
Feb 24, 2024 · Syntax. Here is the syntax for switch statement: switch (variable) { case 1: . break; case 2: . break; default: . } . The above parameters are explained below: Variable: This is the variable for which comparison is to be made. Case: There are many case statements.
The syntax of the switch statement in C++ is: switch (expression) {. case constant1: // code to be executed if. // expression is equal to constant1; break; case constant2: // code to be executed if. // expression is equal to constant2;
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May 15, 2024 · We start a switch statement by using the switch keyword, followed by parentheses with the conditional expression that we would like to evaluate inside. Often the expression is just a single variable, but it can be any valid expression.
