什么样的逻辑运算符是什么?

What kind of logical operator is?

我是 Mathematica 的新手,我看到了这个标志,有人能告诉我这是什么意思吗? =!=

If[m - l =!= 0, net0 = convtomat[dd,m - l];
    row0 = {}; row1 = {}; row2 = {};
    Do[
      row1 = Append[row1, net0[[1, j + 1]]], {j, 0, m - l}
      ];
    ccts = Join[ccts, row1],
    ccts = Join[ccts, dd]
  ]

UnsameQ运算符。

如果 m - l0 不同,

m - l =!= 0 将 return 为真。否则,它将return false.