/ Operator (Visual Basic)

Divides two numbers and returns a floating-point result.

Syntax

expression1 / expression2  

Parts

expression1
Required. Any numeric expression.

expression2
Required. Any numeric expression.

Supported Types

All numeric types, including the unsigned and floating-point types and Decimal.

Result

The result is the full quotient of expression1 divided by expression2, including any remainder.

The \ Operator (Visual Basic) returns the integer quotient, which drops the remainder.

Remarks

The data type of the result depends on the types of the operands. The following table shows how the data type of the result is determined.

Operand data types Result data type
Both expressions are integral data types (SByte, Byte, Short, UShort, Integer, UInteger, Long, ULong) Double
One expression is a Single data type and the other is not a Double Single
One expression is a Decimal data type and the other is not a Single or a Double Decimal
Either expression is a Double data type Double

Before division is performed, any integral numeric expressions are widened to Double. If you assign the result to an integral data type, Visual Basic attempts to convert the result from Double to that type. This can throw an exception if the result does not fit in that type. In particular, see "Attempted Division by Zero" on this Help page.

If expression1 or expression2 evaluates to Nothing, it is treated as zero.

Attempted Division by Zero

If expression2 evaluates to zero, the / operator behaves differently for different operand data types. The following table shows the possible behaviors.

Operand data types Behavior if expression2 is zero
Floating-point (Single or Double) Returns infinity (PositiveInfinity or NegativeInfinity), or NaN (not a number) if expression1 is also zero
Decimal Throws DivideByZeroException
Integral (signed or unsigned) Attempted conversion back to integral type throws OverflowException because integral types cannot accept PositiveInfinity, NegativeInfinity, or NaN
Note

The / operator can be overloaded, which means that a class or structure can redefine its behavior when an operand has the type of that class or structure. If your code uses this operator on such a class or structure, be sure you understand its redefined behavior. For more information, see Operator Procedures.

Example

This example uses the / operator to perform floating-point division. The result is the quotient of the two operands.

Dim resultValue As Double
resultValue = 10 / 4
resultValue = 10 / 3

The expressions in the preceding example return values of 2.5 and 3.333333. Note that the result is always floating-point (Double), even though both operands are integer constants.

See Also

/= Operator (Visual Basic)
\ Operator (Visual Basic)
Data Types of Operator Results
Arithmetic Operators
Operator Precedence in Visual Basic
Operators Listed by Functionality
Arithmetic Operators in Visual Basic