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Order of Precedence

It is necessary to be careful of the meaning of such expressions as a + b * c

We may want the effect as either

(a + b) c


a + (b c)

All operators have a priority, and high priority operators are evaluated before lower priority ones. Operators of the same priority are evaluated from left to right, so that

a - b - c

is evaluated as

( a - b ) - c

as you would expect.

From high priority to low priority the order for all C operators (we have not met all of them yet) is:


a < 10 &&2 b < c

is interpreted as

( a < 10 ) &&( ( 2 b ) < c )


Fri May 20 13:40:49 BST 1994