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Read - calculate - conditionals - output
Introduction to Lua. example from a Well House Consultants training course
More on Introduction to Lua. [link]
Source code: easys Module: U101
-- Add a conditional io.write ("Please enter a temperature in degrees F ") yousaid = io.read() io.write ("you said " .. yousaid .. " to me\n") celcius = (yousaid - 32) / 9 * 5 print ("In C, that's " .. celcius .. " degrees") if (celcius > 100) then print ("Steam") end if (celcius < 0) then print ("Ice") end if (celcius <= 100 and celcius >=0 ) then print ("Water") end -- BUT you don't want to repeat tests, do you? -- (And much nicer to show it over several lines too!) if (celcius > 100) then print ("Steam") elseif (celcius < 0) then print ("Ice") else print ("Water") end -- of if (often comment "end" to let people know what's ending) -- Equality and inequality if (celcius == 0) then print "Cusp" end -- beware float equality if (celcius ~= 0) then print "NoneCusp" end -- unusual "not equals" --[[ Sample Output munchkin:lm12 grahamellis$ lua easys Please enter a temperature in degrees F 4 you said 4 to me In C, that's -15.555555555556 degrees Ice Ice NoneCusp munchkin:lm12 grahamellis$ lua easys Please enter a temperature in degrees F 44 you said 44 to me In C, that's 6.6666666666667 degrees Water Water NoneCusp munchkin:lm12 grahamellis$ lua easys Please enter a temperature in degrees F 444 you said 444 to me In C, that's 228.88888888889 degrees Steam Steam NoneCusp munchkin:lm12 grahamellis$ lua easys Please enter a temperature in degrees F 32 you said 32 to me In C, that's 0 degrees Water Water Cusp munchkin:lm12 grahamellis$ ]] Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Lua * Lua Programming * Lua Programming Also available on on site courses for larger groups Books covering this topic
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