;Task:
* verify the version/revision of your currently running (compiler/interpreter/byte-compiler/runtime environment/whatever your language uses) and exit if it is too old.
* check whether the variable "bloop" exists and whether the math-function "abs()" is available and if yes compute <i>abs(bloop)</i>.


;Extra credit:
* Report the number of integer variables in global scope, and their sum.
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