C Program to grade calculation system

Description

```Get a mark of a stuent and find its grade.
(Note:
96 to 100 - O Grade
91 to 95 - A Grade
71 to 80 - C Grade
61 to 70 - D Grade
50 to 60 - E Grade

Input:
75
Output:
C
```

Solution

```#include<stdio.h>
int main()
{
int mark;
printf("Enter a number:");
scanf("%d",&mark);
if(mark>95&&mark<=100)
{
}
else if(mark>90&&mark<=95)
{
}
else if(mark>80&&mark<91)
{
}
else if(mark>70&&mark<81)
{
}
else if(mark>60&&mark<71)
{
}
else if(mark>49&&mark<61)
{
}
else if(mark>=0&&mark<50)
{
}
else
{
printf("Invalid Mark");
}
return 0;
}
```

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Explanation

`chained conditional check is used here to check the mark range. any one of the grade will be displayed.`

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