What does an odd symbol mean?

Unity Courses Talk
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#1

In the lecture, it is said that " = is an odd symbol is doesn’t really equal. It actually is an assignment."
I want to know what does it mean by odd symbol. Thanks you.

#2

He just means you might think you can say

if (a = b) {

But you can’t… it’s just “odd” as in unexpected, because it looks like it should work.

What that code would do is set a to the value of b, which would make the condition then true

a = 2;
b = 4;

if (a = b) {
    print (a); // this would print 4

You need to use == to compare.

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