In Apex, the Double data type is used to represent decimal numbers with a high degree of precision. A Double is a 64-bit double-precision floating-point number, which allows it to store both integer and fractional parts of a number. It provides a high level of accuracy for working with decimal values.
public class DoubleExample {
public static void main() {
Double pi = 3.14159265359;
Double taxRate = 0.0825;
System.debug('Value of Pi: ' + pi);
System.debug('Tax Rate: ' + taxRate);
// Performing arithmetic operations with Double values
Double result = pi * 2;
System.debug('2 * Pi: ' + result);
}
}
We declare a Double variable pi and initialize it with an approximation of the mathematical constant π (pi).
We declare a Double variable taxRate and set it to a tax rate of 8.25%.
We use System.debug() to print the values of pi and taxRate.
We perform an arithmetic operation by multiplying pi by 2 and store the result in the result variable.
