shl

#shl

##Syntax A shl B

##Description The shl (shift left) operator produces the value of A shifted B bits to the left. Both A and B must be non-negative integers (natural numbers).

##Example Assign the base 2 value 11 to i and then shift it left by 2 places and assign the resulting base 2 value 1100 to j.

    var i, j : int
    i := 2 # 11     % 2#11 = 3 (base 10)
    j := i shl 2        % j becomes 2#1100 = 12 (base 10)

##Details The shl operator is defined mathematically (in a machine-independent way) as follows: A shl B = A * ( 2**B ). Overflow occurs when the result exceeds the maximum value of the nat4 (4-byte natural number) type.

Value A can be of any integer type (as long as it is non-negative) or any natural number type.

The shl operator has the same precedence as the * operator.

##See also shr.html (shift right), or.html, and.html and xor.html, which also are bit manipulation operators that act on non-negative values. See also explicitintegerconstant.html which describes values such as 2#1100.