HP BASIC for OpenVMS is a historical programming language created in 1982.

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Example code from Wikipedia:

10 PRINT "Enter a temperature in Celsius ";
    INPUT C
    when error in
        X = REAL(C)
        PRINT "Temperature in degrees Fahrenheit is "; (X * 1.8) + 32
    use
        PRINT "Error: Enter a valid numeric value."
    end when 
 40 END
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Last updated February 11th, 2019