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Question: what does `:=` means?

Question:what does `:=` means?

serena88 110
student
June 12 2012
0

Hi, i wrote my script file some time ago, and found that I wrote `:=` in one of the equations. when I remove the ``, just let it be :=, it does not work and is spending a long time to evaluate. May I know what does `:=` means please?

Thanks.
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