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`

or

`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:

Thus

`a < 10 &&2 b < c`

is interpreted as

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

and

`
`as

`
`

Wed Sep 14 10:06:31 BST 1994