Skip to main content

​
Problem Statement

Write a C program to accept a name and check if it contains only alphabets (A–Z, a–z). Display an error message if any invalid character is entered.

​
Solution

#include <stdio.h>

int main() {
    char studentname[100];
    int valid;

    printf("Enter your name\n");
    scanf("%s", studentname);

    for (int i = 0; studentname[i] != '\0'; i++) {
        if ((studentname[i] >= 'A' && studentname[i] <= 'Z') ||
            (studentname[i] >= 'a' && studentname[i] <= 'z')) {
            valid = 1;
        } else {
            valid = 0;
        }
    }

    if (valid == 1) {
        printf("your name is %s\n", studentname);
    } else {
        printf("Invalid name");
    }

    return 0;
}

​
Input

Rahul

​
Output

your name is Rahul