Question

The operator precedence table I can find is:

https://developer.mozilla.org/en/JavaScript/Reference/Operators/Operator_Precedence

according to the table, both ‘>>’ and ‘*’ are left-to-right associate, and ‘>>’ have higher precedence, so I think
a >> b * c should explain as (a >> b) * c
however, my test in Firefox (using Firebug), tell me:

0x11 >> 1      ....    8
0x11 >> 1 * 2  ....    4

Which confuses me a lot, should it be 16 instead?

OK, I understand that we always should use parentheses when precedence is not clear, however there should be a rule or explain of what is happening?

Answer 1

If I look at that table, the * operator has a higher precedence than >>, therefore * binds earlier. It is interpreted as:

• 0x11 >> 1 * 2
• 0x11 >> (1 * 2)
• 0x11 >> (2)
• 0x11 >> 2