A programming question: assign a value to a variable

[jrodriguez-9]

Hi I want to let lambda be = 1 if normal or 0.75 lightweight. how can I prepare a simple input like this so when I do a calc I specify either normal or lightweight . can any one tell me what is the best way to put this? thanks

[jrodriguez-9]

[jrodriguez-9]

This does not work. I am trying to see how I can best represent this. Any ideas? please share. Thank you.

[StuartBruff]

I'm afraid I haven't got Prime, so I've answered in Mathcad 15 - simply substitute your elseif for the otherwise (noting that you don't have a result for when neither condition is true).

Stuart

[MJG]

Do you have another variable in your sheet that clarifies if your concrete is normal or lightweight?

If so, you can do something like this:

If not, I'd just make a text comment: