Write a Java Program to convert string variables to double

Converting a string variable to a double in Java can be useful when you want to perform mathematical operations or use double variables for any other purpose.

This can be achieved using the Double.parseDouble() method in Java.

Here’s an example Java program that demonstrates how to convert string variables to double:

public class StringToDouble {
   public static void main(String[] args) {
      String strNum = "123.45";
      double num = Double.parseDouble(strNum);
      System.out.println("String value: " + strNum);
      System.out.println("Double value: " + num);
   }
}

In the above program, we first declare a string variable strNum and assign it the value "123.45".

We then convert this string to a double using the Double.parseDouble() method and assign it to a double variable num.

Finally, we print out both the string and double values using the System.out.println() method.

Note that if the string value cannot be converted to a double, a NumberFormatException will be thrown.

To avoid this, you can use a try-catch block to handle the exception.

In conclusion, converting a string variable to a double in Java can be done using the Double.parseDouble() method.

It is a useful technique for performing mathematical operations or using double variables in your program.

Tags

Related Posts