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數學中函數sgn表示什麼?
數學中函數sgn表示什麼?
Sgn函數返回一個整型變數,指出參數的正負號.語法Sgn(number),number參數是任何有效的數值運算式.返回值如果number大於0,則Sgn返回1,等於0,返回0,小於0,則返回-1,number參數的符號决定了Sgn函數的返回值.1.數學上的符號函數即x>0,sgnx=1 x=0,sgnx= 0 x
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