Programming Fundamentals/Functions/Lua

subroutines.lua

function get_f()
    local f
    
    print("Enter Fahrenheit temperature:")
    f = tonumber(io.read())
        
    return f
end

function calculate_c(f)
    local c
    
    c = (f - 32) * 5 / 9
        
    return c
end

function display_result(f, c)
    print(f .. "° Fahrenheit is " .. c .. "° Celsius")
end

function main()
    local f
    local c
    
    f = get_f()
    c = calculate_c(f)
    display_result(f, c)
end

main()

Try It

Copy and paste the code above into one of the following free online development environments or use your own Lua compiler / interpreter / IDE.

• CodeChef
• Ideone
• repl.it
• TutorialsPoint

See Also

• Lua.org: Reference Manual