The (<<) operator is use to shift the bits of an expression to the left.
Syntax
result = expression1 << expression2
The << operator syntax has these parts:
Part |
Description |
result |
Any variable. |
expression1 |
Any expression. |
expression2 |
Any expression. |
Example
The << operator shifts the bits of expression1 left by the number of bits specified in expression2. For example:
temp = 14
document.write(temp);
temp = 14 << 2;
document.write(temp);
|
s = "Today is: ";
x = new Array("Sunday", "Monday", "Tuesday");
x = x.concat("Wednesday","Thursday", "Friday");
x = x.concat("Saturday");
d = new Date();
day = d.getDay();
s += x[day];
document.write(s);
|
 To run the code above, paste it into JavaScript Editor, and click the Execute button.
The variable temp has a value of 56 because 14 (00001110 in binary) shifted left two bits equals 56 (00111000 in binary).
For information on when a run-time error is generated by the << operator, see the Operator Behavior table.
See also: <<= Operator, >> Operator, >>> Operator, Operator Behavior, Operator Precedence, Operator Summary |
