grade.js

/* finding grade of student 
     avg         Grade
	 90-100      A+
	 80-89       A
	 70-79       B+
	 60-69       B
	 50-59       C
	 40-49       D
	 0-39        Fail
    
    Note: min marks in each sub is 40	
	*/
	
	//defining a function to find grade of student
	
	function getResult()
	{
		let   hm,cm,jm,bm,tot,avg,grd;           //local variable name should not match with html id's 
		
		//data coll
		hm=+html.value;
		cm=+css.value;
		jm=+js.value;
		bm=+bs.value;
		
		//calc's 
		tot=hm+cm+jm+bm;
		abg=tot/4;
		
		//checking pass or Fail
		if(hm>39&&cm>39&&jm>39&&bm>39)
		{
			//pass
			grd=avg>=90?'A+':avg>=80?'A':avg>=70?'B+':avg>=60?'B':avg>=50?'C':'D';
		}
		else{
			grd='Fail';
		}
		
		//displaying op's 
		total.value="Total Marks :"+tot;
		average.value="Average :"+avg;
		grade.value="Grade :"+grd;
		
		
	}