For example, ≥ write > = ≤ write

There is also a continuous comparison. B<c, like this, should be written as < b & amp& ampb & ltc.

And in mathematical expressions, you can omit the multiplication sign, such as 2abc, but it must be 2*a*b*c in C.

There are many similar small differences, and you will know when you are familiar with them.