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C++ if Statement

Compound Statements in C++

Last Updated : 19 Oct, 2023

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Compound statements in C++ are blocks used to group multiple statements together into a single unit. These statements are enclosed in curly braces {} and can be used wherever a single statement is expected. The statements put inside curly braces are executed just like a single statement would have been executed. The compound statements help in organizing code and provide a way to execute multiple statements sequentially.

Syntax of Compound Statements

The compound statements look like this in the program:

{      // Statements      statement1;      statement2;      // ...      statementN;  }

We just have to put multiple statements in the braces {}.

Examples of Compound Statements

Example 1: Using Compound Statements with Functions

The compound statements are commonly used within the function definitions. All the statements inside a function's body are enclosed as the compound statement.

C++

// C++ Program to illustrate Compound Statements in // Functions #include <iostream> using namespace std;  void GFG() // compound statement start {     cout << "Hello World" << endl; } // compound statement end  // driver code int main() {     GFG();     return 0; }

Output

1 2 3 4 5

Example 2: Compound Statement with if Statement

The compound statements are used in if statements for the instance when multiple statements need to be executed conditionally.

C++

// C++ Program to illustrate Compound Statements in // Conditional Statements #include <iostream> using namespace std;  int main() {     int x = 20;     if (x > 6) {         cout << "x is greater than 6"              << std::endl; // statement 1         cout << "Inside the if block"              << std::endl; // statement 2     }     return 0; }

Output

x is greater than 6  Inside the if block

Example 3: Simple Compound Statement Inside a Function

In this program, we will use we'll use a compound statement in between a function which also controls the scope of the variables.

C++

// C++ Program to illustrate Compound Statements in Variable // Scope #include <iostream> using namespace std;  int main() {     int x = 8; // Outer variable     cout << "Outer x: " << x << endl;      // Variable Scope Starts     {         int x = 30;         cout << "Inner x: " << x << endl;     }     // Variable Scope Ends      // Access the outer x after the inner block scope     cout << "Outer x: " << x << endl;      return 0; }

Output

Outer x: 8  Inner x: 30  Outer x: 8

Conclusion

As we have seen, compound statements are an integral part of the C programming languages. It is used with almost all of the components of the C to group the statements together or provide a separate scope.

C++ if Statement

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