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yoohooos12-Amethyst
12-Amethyst
May 18, 2020
Solved

What are the differences between := in regular math block and <- in loop block?

From my (very limited) experience, in the (if, while) loop, Mathcad doesn't allow := but only <-. I was just wondering how are they differ from one another.

 

Thank you!

AlanStevensAnswer
19-Tanzanite
May 18, 2020

They are both assignment operators, but the left arrow is used within a programming structure, while the := is only used outside a programming structure.

 

Why this is the case, I've no idea!

 

Alan

 

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7 replies

AlanStevens19-TanzaniteAnswer
19-Tanzanite
May 18, 2020

They are both assignment operators, but the left arrow is used within a programming structure, while the := is only used outside a programming structure.

 

Why this is the case, I've no idea!

 

Alan

 

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    LucMeekes23-Emerald IV
    23-Emerald IV
    May 18, 2020

    LucMeekes_0-1589810120180.png

    Success!

    Luc

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    yoohooos12-AmethystAuthor
    12-Amethyst
    May 18, 2020

    Could you please explain what does each means? 

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    Fred_Kohlhepp23-Emerald I
    23-Emerald I
    May 18, 2020

    As Alan says they're both assignment operators.  The "left arrow."  { <--} only works in program blocks.  Assignments inside program blocks stay inside program blocks--the assignment isn't valid outside the program.  The { :=} assignment is the more common one, out in "free Mathcad."  That assigns the variable/function for the rest of the sheet (below and right of) unless it is overwritten by another assignment statement.

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