Introduction Data type Variable-Constant Keyword-Identifier Operations Input&Output If-else Switch loops String Array Functions Recursion-Function Mat-Function Pointers File handling Read & write Error handling Read & write error handling

Introduction Data type Variable-Constant Keyword-Identifier Operations Input&Output If-else Switch loops String Array Function Recursion-Function Mat-Function Pointers File handling read & write error handling read & write error handling
String

Strings are sequences of characters used to store string/text data.

Any group of cheracter defined between bouble quotation(" ") .

C does't support string as a data type


Example 
#include <stdio.h>

 int main() {
    // Predefined name & college name
    char name[] = "Vedanth";
    char college[] = "PU University"; 

    // Print the name and college name
    printf("Name: %s\n", name);
    printf("College: %s\n", college);
                    
            return 0;
     }

Output
  Name: Vedanth
  College:PU University
Accessing data
In this we access data using the index number[] 
   char name[]="Yuvaraja"; 
   // accessing specific element
   printf("%c",name[2]);

Example 
#include <stdio.h>

 int main() {
  char name[] = "Yuvaraja";
   // Index of the character to access
  int index = 2; 
   
  char character = name[index];
  printf("Character at index %d is :%c\n", index, character);

  printf("Character at index 0 is :%c\n ", name[0]);
     
    return 0;
  }

Output
 Character at index 0 is: Y
 Character at index 2 is: v
Modify / Change the data
Example 
#include <stdio.h>
int main() {
  char name[] = "Yuvaraja";
  // Index of the character to access
  int index = 2; 
// Here we modifing the first element 
  name[0]='B';
  char character = name[index];
  printf("Character at index %d is:%c\n", index, character);

  //After change Y to B
  printf(" After modifing the name:%s",name);

  return 0;
}

Output


Character at index 2 is: v
After modifing the name: Buvaraja
String length
Finding the total number of string length using the strlen() function

Example 
 #include <stdio.h>
 #include <string.h>

 int main() {
   char name[] = "Vedanth";
   int length = strlen(name);

   printf("The length of the string is:%d\n", length);

  return 0;
}

Output
The length of the string is: 7

Coneatentage String
Its comines two string using the strcat() function

Example 
#include <stdio.h>

  int main(){
    char first_name[]="Yuva";
    char last_name[]="raja";
    strcat(first_name,last_name);
    printf("Here combines two name :%s",first_name);
    
    return 0;
               }

Output
                
Here combines two name :Yuvaraja
Copy string
Here we can copy the one variable value & we can assign to other variable. Using strcpy() function .
Example 
#include <stdio.h>

int main(){
    char name[20]="Vedanth";
    char name1[20];
    strcpy(name1,name);
    printf("Copyed after : %s",name1);
    
    return 0;
 }
Output
  Copyed after : Vedanth
Compare two string
Here we can compare two string using the strcmp() function.
Example 
#include <stdio.h> 
 #include <string.h>
   main()  {  
    // declaration of char array 
   char str1[20]="yuva";   
   char str2[20]="vyuva";   
   int value; 
   // comparing both the strings using strcmp() function  
   value=strcmp(str1,str2);  
   if(value==0)  {
      printf("Strings are same"); 
   } 
   else  {
      printf("Strings are not same");  
}  }

Output
 Strings are not same

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Coding

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