[Primitive Values, Wrapper Classes, Types and Casting]

Following is a code to convert a String into Double.
Fill the missing parts of the code:

________ str = "15.45";

double d = __________ (Double.parseDouble(str));

Question

[Primitive Values, Wrapper Classes, Types and Casting] 

        Following is a code to convert a String into Double. 
        Fill the missing parts of the code:
    

    

________ str = "15.45";

double d = __________ (Double.parseDouble(str));

Accepted Answer

Correct Code:
    

    

String str = "15.45";

double d = Double.parseDouble(str);

    

    

        Step 1: Identify First Blank

        
            The variable str stores text:
        

        
"15.45"
        

        
            Therefore, its datatype must be:
        

        
String
        

        Step 2: Identify Second Blank

        
            The method:
        

        
Double.parseDouble(str)
        

        
            already converts the string into a double value.
        

        
            So no extra method or wrapping is required.
        

        Final Code:

        
String str = "15.45";
double d = Double.parseDouble(str);
        

        How It Works:

        

            
                Component
                Purpose
            

            
                String str
                Stores numeric value in text format
            

            
                Double.parseDouble()
                Converts String → double primitive
            

        

        Important Concept:

        
Wrapper Class → Double  
Conversion Method → parseDouble()
        

        Other Similar Methods:

        

            
                Method
                Conversion
            

            
                Integer.parseInt()
                String → int
            

            
                Double.parseDouble()
                String → double
            

            
                Float.parseFloat()
                String → float
            

        

        Conclusion:

        

            
                First blank → String
            

            
                Second blank → Double.parseDouble(str)
            

            
                Result → String converted to double

[Primitive Values, Wrapper Classes, Types and Casting]

Following is a code to convert a String into Double. Fill the missing parts of the code:

str = "15.45"; double d = __ (Double.parseDouble(str));

Answer with Explanation

Step 1: Identify First Blank

Step 2: Identify Second Blank

Final Code:

How It Works:

Important Concept:

Other Similar Methods:

Conclusion:

Component	Purpose
String str	Stores numeric value in text format
Double.parseDouble()	Converts String → double primitive

Method	Conversion
Integer.parseInt()	String → int
Double.parseDouble()	String → double
Float.parseFloat()	String → float

[Primitive Values, Wrapper Classes, Types and Casting] Following is a code to convert a String into Double. Fill the missing parts of the code: ________ str = "15.45"; double d = __________ (Double.parseDouble(str));