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set serveroutput on
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declare
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v_num number := &sv_num;
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v_result number;
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begin
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v_result := power(v_num,2);
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dbms_output.put_line('The value of v_result is:'||v_result);
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end;
- /
set serveroutput on :启用dbms_output.put_line语句
power(x,y) :计算x^y次方，返回。