| 2. 5. 16. >> (Shift Right with Sign) |
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The shift right with sign operator looks at the integer to the left of the operator, num1, as a 32-bit binary number. |
All the bits in this number are shifted to the right by the number of positions specified by num2. |
If the original number is positive, zeros are added to the left side of the binary number. |
If the original number is negative, ones are used. |
The extra bits on the right are lost. |
The 32-bit binary result of shifting operation is converted to an integer value and returned from the shift right with sign operation. |
The result generated from the shift right with sign operator can be quickly calculated by dividing the number by 2 raised to the x power, where x is the number of positions shifted. Discard the remainder. |
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<html>
<script language="JavaScript">
<!--
// 14 = 00000000000000000000000000001110
// 3 = 00000000000000000000000000000011
x = 14 >> 2;
document.write("14 >> 2 = ",x);
document.write("<br>");
// -4 = 11111111111111111111111111111100
// -2 = 11111111111111111111111111111110
y = -4 >> 1; //y is equal to -2
document.write("-4 >> 2 = ",y);
-->
</script>
</html>
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