# Airthmetic Operators

Arithmetic Operators are used to perform mathematical operations e.g. addition operator (+), subtractaction operator (-), multiplication operator (*), division operator (/) and modulus operator (%). Let's go through all operators one by one.

### Addition Operator (+)

This operator can be used to add one value into another value like numbers, string, arrays and hash tables.

Example
```\$mathsMarks = 81;
\$scienceMarks = 93;

\$totalMarks = \$mathsMarks + \$scienceMarks;

\$totalMarks;
```

Above statements will give output total marks "174".

Let's take another example.

Example
```\$mathsMarks = 81;
\$scienceMarks = 93;
\$label = "Total Marks";
\$totalMarks = \$mathsMarks + \$scienceMarks;

\$label + \$totalMarks;
```

Above statements will give output "Total Marks174".

Note: Here \$label is a string type variable and if you use + operator with string type variable as a left operand then it will treat other variables as a string and it will concate two variables as string.

### Subtractaction Operator (-)

This operator can be used to subtract one numeric value from another numeric value.

Example
```\$grossSalary = 10000;
\$tax = 200;
\$netSalary = \$grossSalary - \$tax

\$netSalary;
```

Above statements will give output "9800" as net salary.

### Multiplication Operator (*)

This operator can be used to multiply two numeric values.

Example
```\$grossSalary = 10000;
\$months = 12;
\$anualSalary = \$grossSalary * \$months

\$anualSalary;
```

Above statements will give output "120000" as annual salary.

### Division Operator (/)

This operator can be used to divide one value by another value.

Example
```\$anualSalary = 120000;
\$months = 12;
\$grossSalaryPerMonth = \$anualSalary * \$months

\$grossSalaryPerMonth;
```

Above statements will give output "10000" as salary per month.

### Modulus Operator (%)

This operator can be used to find modulus.

Example
```\$year = 2020;
\$leapYear = \$year % 4;

\$leapYear;
```

Above statements will give output "0" because 2020 is a leap year.