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Lesson: 13 | Arithmetic Operators

Notes

`=` sign is an assignment operator and it assigns a value to a variable.

Integer x = 5;
System.debug(x);

The operator `+` adds two variables.

Integer x = 5;
Integer y = 12;
Integer z = x + y;

System.debug(z);

The operator `-` subtracts a variable from a variable.

Integer x = 16;
Integer y = 12;
Integer z = x - y;

System.debug(z);

**The operator * multiplies a variable with another variable.**

Integer x = 5;
Integer y = 4;
Integer z = x * y;

System.debug(z);

The operator / divides a variable by a variable.

Integer x = 12;
Integer y = 2;
Integer z = x / y;

System.debug(z);

Increment operator.

Adds 1 to the value of x, a variable of a numeric type. If prefixed (++x), the expression evaluates to the value of x after the increment. If postfixed (x++), the expression evaluates to the value of x before the increment.

Integer x = 7;
x++;

System.debug(x);

Integer x = 7;
++x;

System.debug(x);

The operator -- decreases a variable or a number by 1.

Integer x = 12;
x--;
System.debug(x);

Integer x = 8;
--x;
System.debug(x);

Exercises

#	Exercise
1	Calculate the Area of a Triangle

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