Cscityueduhkhelena other basics about javascript

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Unformatted text preview: In f1, x is 3 Call f1() Just alert it undefined To avoid confusion, we usually DON'T use the same name for local and global variables. 4. Program Structure III - 6 (CS1301) Introduction to Computer Programming City Univ of HK / Dept of CS / Helena Wong http://www.cs.cityu.edu.hk/~helena Other Basics about JavaScript Enclose statements in braces { and } va r m a rk; m a rk=p ro m p t('Wh a t is yo u r m a rk? ','') ; if (m a rk>4 0 ) d o c u m e nt.write ('P a s s e d ') ; e ls e d o c u m e nt.write ('Fa ile d .') ; d o c u m e nt.write ('<b r/>') ; d o c u m e nt.write ('Y o u m u s t ta ke th is c o u rs e a g a in!') ; What is your mark? 80 Although last 3 lines are aligned at the same column, JavaScript does not know that they are 'together'. In such case we add { and } to group them together: va r m a rk; m a rk=p ro m p t('Wh a t is yo u r m a rk? ','') ; if (m a rk>4 0 ) d o c u m e nt.write ('P a s s e d .') ; e ls e { d o c u m e nt.write ('Fa ile d .') ; d o c u m e nt.write ('<b...
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