> For the complete documentation index, see [llms.txt](https://mun.gitbook.io/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mun.gitbook.io/c/solution/8-character-and-string/7.4-character-test.md).

# 7.4 Character Test

## 7.4 Character Test

1. \[9] is\_upper - Check whether a Character is an Uppercase Letter or not.
2. \[10] is\_lower - Check whether a Character is a Lowercase Letter or not.
3. \[11] is\_alpha - Check whether a Character is an Alphabet or not.
4. \[12] is\_digit - Check whether a Character is a Digit or not.
5. \[13] is\_alphanum - Check whether a Character is an Alphanumeric Character or not.
6. \[14] is\_vowel - Check whether a Character is a Vowel or not.
   1. 1\. Use if-else.
   2. 2\. Use switch case.
7. \[15] is\_consonant - Check whether a Character is a Consonant or not.
8. \[16] is\_xdigit Check if the character is a hexadecimal digit.
9. \[17] is\_punct Check if the character is a punctuation character.
10. \[18] is\_equal - Test equality of two Characters.

## সমাধান

### \[9] is\_upper - Check whether a Character is an Uppercase Letter or not.

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if(ch >= 'A' && ch <= 'Z'){
        printf("Uppercase Letter\n");
    }
    else{
        printf("Not Uppercase Letter\n");
    }

    return 0;
}
```

{% endcode %}

### \[10] is\_lower - Check whether a Character is a Lowercase Letter or not.

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if(ch >= 'a' && ch <= 'z'){
        printf("Lowercase Letter\n");
    }
    else{
        printf("Not Lowercase Letter\n");
    }

    return 0;
}
```

{% endcode %}

### \[11] is\_alpha - Check whether a Character is an Alphabet or not.

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')){
        printf("Alphabet\n");
    }
    else{
        printf("Not Alphabet\n");
    }

    return 0;
}
```

{% endcode %}

### \[12] is\_digit - Check whether a Character is a Digit or not.

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if(ch >= '0' && ch <= '9'){
        printf("Digit\n");
    }
    else{
        printf("Not Digit\n");
    }

    return 0;
}
```

{% endcode %}

### \[13] is\_alphanum - Check whether a Character is an Alphanumeric Character or not.

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9')){
        printf("Alphanumeric Character\n");
    }
    else{
        printf("Not Alphanumeric Character\n");
    }

    return 0;
}
```

{% endcode %}

### \[14] is\_vowel - Check whether a Character is a Vowel or not.

{% tabs %}
{% tab title="if else" %}
{% code overflow="wrap" lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if(ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U' || ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u'){
        printf("Vowel\n");
    }
    else{
        printf("Not Vowel\n");
    }

    return 0;
}
```

{% endcode %}
{% endtab %}

{% tab title="switch case" %}
{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);    
    switch(ch){
        case 'A':
        case 'E':
        case 'I':
        case 'O':
        case 'U':
        case 'a':
        case 'e':
        case 'i':
        case 'o':
        case 'u':
            printf("Vowel\n");
            break;
        default:
            printf("Not Vowel\n");
            break;
    }

    return 0;
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

### \[15] is\_consonant - Check whether a Character is a Consonant or not.

{% code overflow="wrap" lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')){
        if(!(ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U' || ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')){
            printf("Consonant \n");
        }
        else{
            printf("Not Consonant\n");
        }
    }
    else{
        printf("Not Consonant\n");
    }

    return 0;
}
```

{% endcode %}

### \[16] is\_xdigit Check if the character is a hexadecimal digit. (function)

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')){
        printf("Hexadecimal Digit\n");
    }
    else{
        printf("Not Hexadecimal Digit\n");
    }

    return 0;
}
```

{% endcode %}

### \[17] is\_punct Check if the character is a punctuation character. (function)

{% code overflow="wrap" lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch, lower_case;
    
    scanf(" %c", &ch);
    if(ch == '!' || ch == '"' || ch == '#' || ch == '$' || ch == '%' || ch == '&' || ch == '\'' || ch == '('  || ch == ')' || ch == '*' || ch == '+' || ch == '-' || ch == '.' || ch == '/'|| ch == ':' || ch == ';' || ch == '<' || ch == '=' || ch == '>' || ch == '?' || ch == '@' || ch == '[' || ch == '\\' || ch == ']' || ch == '^' || ch == '_' || ch == '`' || ch == '{' || ch == '|' || ch == '}' || ch == '~'){
        printf("Punctuation Character\n");
    }
    else{
        printf("Not Punctuation Character\n");
    }

    return 0;
}
```

{% endcode %}

### \[18] is\_equal - Test equality of two Characters.

{% code lineNumbers="true" %}

```c
#include<stdio.h>
int main(){
    char ch1, ch2;
    
    scanf(" %c %c", &ch1, &ch2);
    if(ch1 == ch2){
        printf("Equal\n");
    }
    else{
        printf("Not Equal\n");
    }
    
    return 0;
}
```

{% endcode %}