How to keep only Alphabets in a String in C - Step by Step Examples

How to keep only Alphabets in a String in C ?

Answer

To keep only alphabets in a string in C, you can iterate through the characters of the string and check if each character is alphabetic using the 'isalpha' function.

✐ Examples

1 Keep Only Alphabets in "Hello123 World"

In this example,

We create a character array str1 with a value of "Hello123 World".
We iterate through each character of the array.
If the character is alphabetic (using the isalpha function), we append it to a new string result1.
Finally, we print the modified string result1.

C Program

#include <stdio.h>
#include <ctype.h>

int main() {
  char str1[] = "Hello123 World";
  char result1[100];
  int j = 0;

  for (int i = 0; str1[i] != '\0'; ++i) {
    if (isalpha(str1[i])) {
      result1[j++] = str1[i];
    }
  }
  result1[j] = '\0';

  printf("Modified string: %s\n", result1);
  return 0;
}

Output

Modified string: HelloWorld

2 Keep Only Alphabets in "apple@banana"

In this example,

We create a character array str2 with a value of "apple@banana".
We iterate through each character of the array.
If the character is alphabetic (using the isalpha function), we append it to a new string result2.
Finally, we print the modified string result2.

C Program

#include <stdio.h>
#include <ctype.h>

int main() {
  char str2[] = "apple@banana";
  char result2[100];
  int j = 0;

  for (int i = 0; str2[i] != '\0'; ++i) {
    if (isalpha(str2[i])) {
      result2[j++] = str2[i];
    }
  }
  result2[j] = '\0';

  printf("Modified string: %s\n", result2);
  return 0;
}

Output

Modified string: applebanana

Summary

In this tutorial, we learned How to keep only Alphabets in a String in C language with well detailed examples.

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How to keep only Alphabets in a String in C - Step by Step Examples

How to keep only Alphabets in a String in C ?

Answer

✐ Examples

1 Keep Only Alphabets in "Hello123 World"

C Program

Output

2 Keep Only Alphabets in "apple@banana"

C Program

Output

Summary

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