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Programming in D: The Ultimate Guide for Software Engineers

Advanced Arithmetic Operations on Integers

This lesson is a continuation of the previous lesson, and it explores some advanced arithmetic operations that we can perform with integers in D.

We'll cover the following...

Arithmetic operations with assignment #

All of the operators that take two expressions have assignment counterparts. These operators assign the result back to the expression that is on the left-hand side:

D
import std.stdio;
void main() {
    int number = 10;
    number += 20;  // same as number = number + 20; now 30
    writeln(number);
    number -= 5;   // same as number = number - 5;  now 25
    writeln(number);
    number *= 2;   // same as number = number * 2;  now 50
    writeln(number);
    number /= 3;   // same as number = number / 3;  now 16
    writeln(number);
    number %= 7;   // same as number = number % 7;  now  2
    writeln(number);
    number ^^= 6;  // same as number = number ^^ 6; now 64
    writeln(number);
}

Negation: - #

This operator converts the value of the expression from negative to positive or vice versa:

D
import std.stdio;
void main() {
    int number_1 = 1;
    int number_2 = -2;
    writeln(-number_1);
    writeln(-number_2);
}

It is different from subtraction because it takes only one operand. Since unsigned types cannot have negative values, the result of using this operator with unsigned ...