1/13/00
COM1100
Winter2000 Yuhong Yin Northeastern University
7
Rules of
expressions -- 2
nSets of parentheses may also be enclosed by other parentheses and expressions in the innermost parentheses are always evaluated first.
n(2 * (3 + 7) ) / 5
= ( 2 * 10 ) /
5
= 20 / 5
= 4
nParentheses can not be used to indicate multiplication
n( 3 + 4 ) ( 5 + 1)
// Wrong !
n( 3 + 4 ) * ( 5 + 1)
// OK !