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if expression commands evaluated if True else commands evaluated if False end ÔÚÕâÀÈç¹û±í´ïÊ½ÎªÕæ£¬ÔòÖ´ÐеÚÒ»×éÃüÁÈç¹û±í´ïʽÊǼ٣¬ÔòÖ´Ðеڶþ×éÃüÁî¡£ µ±ÓÐÈý¸ö»ò¸ü¶àµÄÑ¡Ôñʱ£¬If-Else-End ½á¹¹²ÉÓÃÐÎʽ if expression1 commands evaluated if expression1 is True elseif expression2 commands evaluated if expression2 is True elseif expression3 commands evaluated if expression3 is True elseif expression4 commands evaluated if expression4 is True elseif ?? £® £® £® else commands evaluated if no other expression is True end ×îºóµÄÕâÖÖÐÎʽ£¬Ö»ºÍËùÅöµ½µÄ¡¢ÓëµÚÒ»¸öÕæÖµ±í´ïʽÏà¹ØµÄÃüÁî±»Ö´ÐУ»½ÓÏÂÀ´µÄ ¹ØÏµ±í´ïʽ²»¼ìÑé£¬Ìø¹ýÆäÓàµÄ If-Else-End ½á¹¹¡£¶øÇÒ£¬×îºóµÄ else ÃüÁî¿ÉÓпÉÎÞ¡£ ¡¾Àý¡¿ if rand(1>0.5 disp('i love you' else disp('i donot love you' end ¡¾Àý¡¿Ò»¸ö¼òµ¥µÄ·ÖÖ§½á¹¹¡£ cost=10;number=12; if number>8 7

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