13.Print result sheet using if and else:

#include<stdio.h>
int main()
{
    int score;
    printf("Enter your score:");
    scanf("%d",&score);
    if((score>=80)&&(score<=100))
    printf("\n your grade is A+.\n");
    else if((score>70)&&(score<=80))
    printf("\n your grade is A.\n");
    else if((score>60)&&(score<=70))
    printf("\n your grade is A-.\n");
    else if((score>50)&&(score<=60))
    printf("\n your grade is B.\n");
    else if((score>40)&&(score<=50))
    printf("\n your grade is C.");
    else
    printf("\n your grade is F.\n");
    return 0;
}