Given the following test scores and grade equivalents, write a function which is

Question

Given the following test scores and grade equivalents, write a function which is passed a score, and returns a letter grade based on write a function
    which is passed a score, and returns a letter grade based on
    the score entered. A number less than 0 or greater than 100 is invalid.

            Score                 Grade
            ------                  -----
            90-100                  A
            80-89                    B
            70-79                    C
            60-69                    D
            0 -59                     F
Please make it the code easy to read in beginners C language

Explanation / Answer

char grade(int score)
{
//Returns 'G' if score is invalid
   if(score>100)
       return 'G';
   else if(score>=90)
       return 'A';
   else if(score>=80)
       return 'B';
   else if(score >=70)
       return 'C';
   else if(score >=60)
       return 'D';
   else if(score >=0)
       return 'F';
   else
       return 'G';
}

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