Hi,
You can refer below code....
REPORT ZSELECTION_SCR.
selection-screen :begin of block test with frame title text-001.
parameters:p_rad1 radiobutton group one user-command test,
p_rad2 radiobutton group one.
selection-screen:end of block test.
START-OF-SELECTION.
CASE 'X'.
WHEN p_rad1.
"set male
WHEN p_rad2 .
"set female
ENDCASE.