Operator Shl (Shift Left)
Shifts the bits of a numeric expression to the left
Syntax
`
Declare Operator Shl ( ByRef lhs As Integer, ByRef rhs As Integer ) As Integer
Declare Operator Shl ( ByRef lhs As UInteger, ByRef rhs As UInteger ) As UInteger
Declare Operator Shl ( ByRef lhs As LongInt, ByRef rhs As LongInt ) As LongInt
Declare Operator Shl ( ByRef lhs As ULongInt, ByRef rhs As ULongInt ) As ULongInt
`
Usage
`
result = lhs Shl rhs
`
Parameters
`lhs`
The left-hand side expression.
`rhs`
The right-hand side shift expression.
Return Value
Returns the result of `lhs` being shifted left `rhs` number of times.
Description
`Operator Shl` (Shift left) shifts all of the bits in the left-hand side expression (`lhs`) left a number of times specified by the right-hand side expression (`rhs`). Numerically, the result is the same as "`CInt( lhs * 2 ^ rhs )`". For example, "`&b0101 Shl 1`" returns the binary number `&b01010`, and "`5 Shl 1`" returns `10`.
Neither of the operands are modified in any way.
If the result is too large to fit inside the result's data type, the leftmost bits are discarded ("shifted out").
The results of this operation are undefined for values of `rhs` less than zero, or greater than or equal to the number of bits in the result's data type.
This operator can be overloaded for user-defined types.
Example
`
'Double a number
For i As Integer = 0 To 10
Print 5 Shl i, Bin(5 Shl i, 16)
Next i
`
Output:

     5            0000000000000101
     10           0000000000001010
     20           0000000000010100
     40           0000000000101000
     80           0000000001010000
     160          0000000010100000
     320          0000000101000000
     640          0000001010000000
     1280         0000010100000000
     2560         0000101000000000
     5120         0001010000000000

Dialect Differences

- Not available in the -lang qb dialect unless referenced with the alias `__Shl`.

Differences from QB

- New to FreeBASIC

See also

- `Operator Shl= (Shift Left And Assign)`
- `Operator Shr (Shift Right)`
- `Bin`
- Mathematical Functions