Check if the String Numeric or Alphabetic

Code

#include <stdio.h>
#include <stdint.h>

void classify_string(const char *str) {
    // Your logic here
    int val=0;
    while(*str!='\0')
    {
        if(((*str>='a')&&(*str<='z'))||((*str>='A')&&(*str<='Z')))
        {
            if(val==2) 
            {
                val =3;
                break;
            }
            val=1;//alpha
        }
        else if ((*str>='0')&&(*str<='9'))
        {
            if(val==1)
            {
                val =3;
                break;
            }
            val=2; // num
        }
        else val =3;
        str++;
    }
    if(val==1)
    {
        printf("ALPHABETIC");
    }
    else if (val==2)
    {
        printf("NUMERIC");
    }
    else
    {
        printf("MIXED");
    }
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    classify_string(str);
    return 0;
}

Solving Approach

 

 

 

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Input

123456

Expected Output

NUMERIC