A certain instructor assigns a 50-point problem and calculates an integer score 0-50 and assigns a letter grade according to the scale 40 - 50 is an A, 30 - 39 is a B, 20 - 29 is a C, 10 - 19 is a D and 0 - 9 is an F. Write a Python function called letter_grade which takes one argument, an integer, and RETURNS the appropriate letter grade.

Following are the code to this question:

def letter_grade(x): #defining a method letter_grade that accepts one parameter

   if x>=50 and x<=40:#defining if block that check value of x greater than 50 and less than 40

       print("A")#print value

   if x>=30 and x<=39:#defining if block that check value of x greater than 30 and less than 39

       print("B")#print value

   if x>=20 and x<=29:#defining if block that check value of x greater than 20 and less than 29

       print("C")#print value

   if x>=10 and x<=19:#defining if block that check value of x greater than 10 and less than 19

       print("D")#print value

   if x>=0 and x<=9:#defining if block that check value of x greater than 0 and less than 9

       print("F")#print value

letter_grade(30) #calling the method letter_grade

Output:

B

Explanation:

In the above Python code, a method "letter_grade" is declared, that accepts an integer variable in its parameter, and defined the multiple if block to check the given value, which can be defined as follows:

In the first, if block, it checks the value of x greater than 50 and less than 40 , if the condition is true it will print the value "A".In the second, if block, it checks the value of x greater than 30 and less than 39,  if the condition is true it will print the value "B".In the third, if block, it checks the value of x greater than 20 and less than 29,  if the condition is true it will print the value "C".  In the fourth, if block, it checks the value of x greater than 10 and less than 19,  if the condition is true it will print the value "D".In the fifth, if block, it checks the value of x greater than 0 and less than 9,  if the condition is true it will print the value "F".

And at the last it call the method.

Yes that is thw correct answer

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