Question

How do strings relate to arrays? name at least one string function and explain what it does.

Answer 1

How string relate to the array? • String is a sequence of characters with single data type. • Array is a collection of an elements with same data type. • String is a same like array. There some difference between string and array. Size of array is fixed when size of string can be anything. String are immutable means we can't change in memory after it created ones. When array is mutable means we can modify it after it is created. • String store in memory in any manner. When array element store in memory in contiguously manner. • In array we can store any data type, when in string we can store a ASCII characters. • String terminates by Null character.

String Functions: • strcat() - used for concatenation of two string • strlen() - used for find the length of a string • strcmp() - used for compare of two string • strcpy( - used for copy one string to another string.

code:

1 #include <stdio.h> #include<string.h> int main() char str1[]="hello"; char str2[]="World"; /*find the length of string using a length function*/ int n1=strlen(stri); int n2=strlen(str2); printf("length of stri is : %d\n", nl); printf("length of str2 is : %d\n",n2); /*concate stri with str2*/ printf("stri before concate: %s\n", stri); strcat(stri, str2); printf("stri after concate: %s\n", str1); return 0;

output:

length of strl is : 5 length of str2 is : 5 Strl before concate: hello Strl after concate: helloWorld ... Program finished with exit code o Press ENTER to exit console. I

explain:

strcat() : add str2 into str1.means it is do concatination of two string.

strlen(): find the length of a string.

code in c:

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

int main()
{
char str1[]="hello";
char str2[]="World";
  
/*find the length of string using a length function*/
int n1=strlen(str1);
int n2=strlen(str2);
  
printf("length of str1 is : %d\n",n1);
printf("length of str2 is : %d\n",n2);

/*concate str1 with str2*/
printf("Str1 before concate: %s\n",str1);
strcat(str1,str2);
printf("Str1 after concate: %s\n",str1);
  

return 0;
}