Student Grade Classification || C Lab Programs

 Program 02: Student Grade Classification

Problem Statement:: Develop a C program that takes a student's marks as input and displays their grade based on specific criteria ranging from Grade A to Grade F. 

Problem Description:

• Input: A single integer representing student marks (0 to 100).

• Output: The corresponding grade (A, B, C, D, or F).

• Constraints: Marks are assumed to be valid integers within the 0-100 range.

• Method: Use an if-else ladder as the most efficient approach for range-based logic. 

Pgm Logic:

1. Start.

2. Input the student's marks.

3. Use conditional statements to check:

• If marks >= 90 Grade A.

• Else if marks >= 75 Grade B.

• Else if marks >= 60 Grade C.

• Else if marks >= 50 Grade D.

• Otherwise Grade F.

4. Display the identified grade.

5. Stop. 

Program Code:

// Purpose: To take student marks as input and display the corresponding grade using an if-else ladder.

#include <stdio.h>

void main()

{

    int marks;

    printf("Enter the student's marks (0 to 100): ");

    scanf("%d", &marks);

    if (marks < 0 || marks > 100)

        printf("Invalid marks! Please enter a value between 0 and 100.\n");

    else if (marks >= 90)

        printf("Grade: A\n");

    else if (marks >= 75)

        printf("Grade: B\n");

    else if (marks >= 60)

        printf("Grade: C\n");

    else if (marks >= 50)

        printf("Grade: D\n");

    else

        printf("Grade: F\n");

}

Output: Enter the student's marks (0 to 100): 95 Grade: A 

RESULT: Thus the program has been executed and the output was verified. 

Remarks: This program was successfully tested in the onlineGDB tool. Range-based selection makes the if-else ladder more suitable than a switch statement. 

Program Explanation: The program captures a numeric score and runs it through a series of thresholds. Once a condition is met, it prints the grade and skips the remaining checks.

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