Case 1: Methods returning a value

For methods that define a return type, return statement must be immediately followed by return value.

Example:

Java

// Java Program to Illustrate Usage of return Keyword

// Main method 
class GFG {

    // Method 1
    // Since return type of RR method is double
    // so this method should return double value
    double RR(double a, double b) {
        double sum = 0;
        sum = (a + b) / 2.0;
      
        // Return statement as we already above have declared
        // return type to be double 
        return sum;
    }

    // Method 2
    // Main driver method
    public static void main(String[] args)
    {
        // Print statement
        System.out.println(new GFG().RR(5.5, 6.5));
    }
}

Output

6.0

Output explanation: When we are calling a class GFG method that has return sum which returns the value of sum and that’s value gets displayed on the console.

Time Complexity of the above Method:

Time Complexity: O(1)
Auxiliary Space : O(1)

return keyword in Java

In Java, return is a reserved keyword i.e., we can’t use it as an identifier. It is used to exit from a method, with or without a value. Usage of return keyword as there exist two ways as listed below as follows:

Case 1: Methods returning a value
Case 2: Methods not returning a value

Let us illustrate by directly implementing them as follows:

Tags:

#Java-keyword #Java-Library #Java #Java

Case 2: Methods not returning a value

Case 1: Methods returning a value

Time Complexity of the above Method:

return keyword in Java

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