i have used case statement on month its jump from 10 month and coming to the endcase?

Dear developers,

please guide me in clarify my issues,i am using case statement its working correctly let 9 month and its not fetching data from 10th to 12th month.

code :

v_mon = wa_rgdir-fpend+4(2).

* CASE v_mon .

* WHEN 1 .

if v_mon eq 1 .

ls_salary-jan = wa_rt-betrg + ls_salary-jan.

MOVE ls_salary-jan TO lv_rename.

move ls_salary-cnt to ls_salary-cnt1.

move ls_salary-cnt1 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-jan1.

lv_count1 = lv_count.

lv_tot1 = ls_salary-jan.

* WHEN 2 .

elseif v_mon eq 2 .

ls_salary-feb = wa_rt-betrg + ls_salary-feb.

MOVE ls_salary-feb TO lv_rename.

move ls_salary-cnt to ls_salary-cnt2.

move ls_salary-cnt2 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-feb1.

lv_tot2 = ls_salary-feb.

lv_count2 = lv_count .

* WHEN 3 .

elseif v_mon eq 3 .

ls_salary-mar = wa_rt-betrg + ls_salary-mar.

MOVE ls_salary-mar TO lv_rename.

move ls_salary-cnt to ls_salary-cnt3.

move ls_salary-cnt3 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-mar1.

lv_count3 = lv_count.

lv_tot3 = ls_salary-mar.

* WHEN 4 .

elseif v_mon eq 4 .

ls_salary-apr = wa_rt-betrg + ls_salary-apr.

MOVE ls_salary-apr TO lv_rename.

move ls_salary-cnt to ls_salary-cnt4.

move ls_salary-cnt4 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-apr1.

lv_count4 = lv_count.

lv_tot4 = ls_salary-apr.

* WHEN 5 .

elseif v_mon eq 5 .

ls_salary-may = wa_rt-betrg + ls_salary-may.

MOVE ls_salary-may TO lv_rename.

move ls_salary-cnt to ls_salary-cnt5.

move ls_salary-cnt5 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-may1.

lv_count5 = lv_count .

lv_tot5 = ls_salary-may.

* WHEN 6 .

elseif v_mon eq 6 .

ls_salary-jun = wa_rt-betrg + ls_salary-jun.

MOVE ls_salary-jun TO lv_rename.

move ls_salary-cnt to ls_salary-cnt6.

move ls_salary-cnt6 to lv_count .

CONCATENATE lv_rename lv_count INTO ls_salary-jun1.

lv_count6 = lv_count.

lv_tot6 = ls_salary-jun.

* WHEN 7 .

elseif v_mon eq 7 .

ls_salary-jul = wa_rt-betrg + ls_salary-jul.

MOVE ls_salary-jul TO lv_rename.

move ls_salary-cnt to ls_salary-cnt7.

move ls_salary-cnt7 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-jul1.

lv_count7 = lv_count.

lv_tot7 = ls_salary-jul.

* WHEN 8 .

elseif v_mon eq 8 .

ls_salary-aug = wa_rt-betrg + ls_salary-aug.

MOVE ls_salary-aug TO lv_rename.

move ls_salary-cnt to ls_salary-cnt8.

move ls_salary-cnt8 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-aug1.

lv_count8 = lv_count.

lv_tot8 = ls_salary-aug.

* WHEN 9 .

elseif v_mon eq 9 .

ls_salary-sep = wa_rt-betrg + ls_salary-sep.

MOVE ls_salary-sep TO lv_rename.

move ls_salary-cnt to ls_salary-cnt9.

move ls_salary-cnt9 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-sep1.

lv_count9 = lv_count.

lv_tot9 = ls_salary-sep.

* WHEN 10.

elseif v_mon eq 10 .

ls_salary-oct = wa_rt-betrg + ls_salary-oct.

MOVE ls_salary-oct TO lv_rename.

move ls_salary-cnt to ls_salary-cnt10.

move ls_salary-cnt10 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-oct1.

lv_count10 = lv_count.

lv_tot10 = ls_salary-oct.

* WHEN 11 .

elseif v_mon eq 11 .

ls_salary-nov = wa_rt-betrg + ls_salary-nov.

MOVE ls_salary-nov TO lv_rename.

move ls_salary-cnt to ls_salary-cnt11.

move ls_salary-cnt11 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-nov1.

lv_count11 = lv_count.

lv_tot11 = ls_salary-nov.

* WHEN 12 .

elseif v_mon eq 12 .

ls_salary-dec = wa_rt-betrg + ls_salary-dec .

MOVE ls_salary-dec TO lv_rename.

move ls_salary-cnt to ls_salary-cnt12.

move ls_salary-cnt12 to lv_count.

CONCATENATE lv_rename lv_count INTO ls_salary-dec1.

lv_count12 = lv_count.

lv_tot12 = ls_salary-dec.

* ENDCASE.

ENDIF.