How to calculate grade without else?

CODE

How to calculate grade without else

int main()

{

    float mark;

    printf("\n Enter the marks(out of 100):");

    scanf("%f",&mark);

    if(mark<=100 && mark>=95)

        printf("\n Grade:O");

    if(mark<95 && mark>=90)

        printf("\n Grade=A");

    if(mark<90 && mark>=85)

        printf("\n Grade=B");

    if(mark<85 && mark>=80)

        printf("\n Grade=C");

    if(mark<80)

        printf("\n Grade=D");

}

Output:

Enter the marks(out of 100):

94

 Grade=A