if statement - Android Studio If Else Conditions -

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i require in forming if else code show message. example, if more or equal 50, message "green mark certified" showed in textview box. below codes did simple calculator. need when int sum>=50 , <75, show "green mark certified" in textview box. please kindly show me how code if want achieve it.

public void onbuttonclick(view v){     edittext e1 = (edittext)findviewbyid(r.id.edittext);     edittext e2 = (edittext)findviewbyid(r.id.edittext2);     edittext e3 = (edittext)findviewbyid(r.id.edittext3);     edittext e4 = (edittext)findviewbyid(r.id.edittext4);     edittext e5 = (edittext)findviewbyid(r.id.edittext5);      textview t1 = (textview)findviewbyid(r.id.textview);     int num1 = integer.parseint(e1.gettext().tostring());     int num2 = integer.parseint(e2.gettext().tostring());     int num3 = integer.parseint(e3.gettext().tostring());     int num4 = integer.parseint(e4.gettext().tostring());     int num5 = integer.parseint(e5.gettext().tostring());     int sum = num1 + num2 + num3 + num4 + num5 ;     t1.settext(integer.tostring(sum));

this how if statement should like:

if(sum >= 50 && sum < 75) {     t1.settext("green mark certified"); }

the conditions placed in parentheses after if, , code executed placed in brackets. && means "and", , || (which not used) means "or".


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