Operators

C++ supports different types of operators such as arithmetic, relational, and logical operators.

Arithmetic Operators

Arithmetic operators can be used to perform common mathematical operations:

• + addition
• - subtraction
• * multiplication
• / division
• % modulo (yields the remainder)

int x = 0;

x = 4 + 2;  // x is now 6
x = 4 - 2;  // x is now 2
x = 4 * 2;  // x is now 8
x = 4 / 2;  // x is now 2
x = 4 % 2;  // x is now 0

Relational Operators

Relational operators can be used to compare two values and return true or false depending on the comparison:

• == equal to
• != not equal to
• > greater than
• < less than
• >= greater than or equal to
• <= less than or equal to

if (a > 10) {
  // ☝️ means greater than
}

Logical Operators

Logical operators can be used to combine two different conditions.

• && requires both to be true (and)
• || requires either to be true (or)
• ! negates the result (not)

if (coffee > 0 && donut > 1) {
  // Code runs if both are true
}

if (coffee > 0 || donut > 1) {
  // Code runs if either is true
}

if (!tired) {
  // Code runs if tired is false
}

Note: Operator overloading is possible in C++. This means that operators can be used with custom types. For example, the + operator can be used to add two custom defined classes together. See overloading.

Below are some other operators that are used in C++: