foo.c:1:1: warning: data definition has no type or storage class
    1 | PI=3.1 415
      | ^~
foo.c:1:1: warning: type defaults to 'int' in declaration of 'PI' [-Wimplicit-int]
foo.c:1:8: error: expected ',' or ';' before numeric constant
    1 | PI=3.1 415
      |        ^~~

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