B = floor(A) rounds the elements of A to the nearest integers less than or equal to A. For complex A, the imaginary and real parts are rounded independently.? (floor：朝負無窮方向舍入)

B = ceil(A) rounds the elements of A to the nearest integers greater than or equal to A. For complex A, the imaginary and real parts are rounded independently. (ceil：朝正無窮方向舍入)

B = fix(A) rounds the elements of A toward zero, resulting in an array of integers. For complex A, the imaginary and real parts are rounded independently. (fix：朝零方向舍入 )

B = round(A) rounds the elements of X to the nearest integers. For complex X, the imaginary and real parts are rounded independently. (round：四舍五入)

>> ceil(9.6)

ans =

??? 10

>> ceil(-9.6)

ans =

??? -9

>> floor(-9.6)

ans =

?? -10

>> floor(9.6)

ans =

???? 9

>> fix(9.6)

ans =

???? 9

>> fix(-.6)

ans =

???? 0

>> fix(-.336)

ans =

???? 0

>> round(-.6)

ans =

??? -1

>> round(-.7)

ans =

??? -1

>> round(-.3)

ans =

???? 0

>> round(.6)

ans =

???? 1

>> round(.5)

ans =

???? 1

總結

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