What does “:=” do?

Question

I\'ve seen := used in several code samples, but never with an accompanying explanation. It\'s not exactly possible to google its use without knowing the proper

Answer 1

Another interpretation from outside the world of programming languages comes from Wolfram Mathworld, et al:

If A and B are equal by definition (i.e., A is defined as B), then this is written symbolically as A=B, A:=B, or sometimes A≜B.

■ http://mathworld.wolfram.com/Defined.html

■ https://math.stackexchange.com/questions/182101/appropriate-notation-equiv-versus