String Handling Function in C

1) strlen() in C :

This function is used to determine the length of a given string.

 Syntax :

variable=strlen(“string”);

The string length will be returned to the variable.

Sample Program

str_len.c

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
            char str[50];
            int len;
            printf("Enter a string : ");
            scanf("%s",&str);

            len = strlen(str);
            printf("\n Length of the Given String is : %d",len);

            getch();
}

Output:

Enter a string : Hello

Length of the Given String is : 5

Click Here to Download

2) strcat() in C :

This function is used to join (concatenate) two strings.

Syntax :

strcat(string1,string2);

Sample program :

str_cat.c

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
            char str1[50], str2[50];
            printf("Enter first string : ");
            scanf("%s",&str1);
           

            printf("Enter second string : ");
            scanf("%s",&str2);
           

strcat(str1,str2);
printf("Concatinated String : %s",str1);

getch();
}

Output:

Enter first string : Good

Enter second string : Morning

Concatinated String : GoodMorning
Click Here to Download 

3) strcmp() in C :

This function is used to compare two strings. They are case sensitive.

Syntax :

strcmp(string1,string2);

If both the strings are equal return value will be 0, else non_zero value will be returned.

Sample program :

str_cmp.c

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

            char str1[50],str2[50];

            int n;

            printf("Enter string one : ");

            scanf("%s",&str1);

            printf("Enter string two : ");

            scanf("%s",&str2);

            n=strcmp(str1,str2);

            if(n==0)

            {

                        printf("Both the Strings are Equal");

            }

            else

            {

                        printf("Strings are not Equal");

            }

            getch();

}

Output :

Enter string one :Hello

Enter string two :Hello

Both the Strings are Equal
Click Here to Download 

4) strcpy() in C :

This function copies the string from one variable to another variable.

Syntax :

strcpy(source_variable, destination_variable);

Sample Program

str_cpy.c

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

            char str1[50], str2[50];

            printf("Enter a string : ");

            scanf("%s",&str1);

            strcpy(str2,str1);

            printf("Value of str1 : %s",str1);

            printf("\nValue of str2 : %s",str2);

            getch();

}

Output :

Enter a string : Good Morning

Value of str1 : Good Morning

Value of str2 : Good Morning
Click Here to Download 

5) strrev() in C :

This function is sued to reverse the characters in a given string.

Syntax :

strrev(string);

Sample program :

str_rev.c

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

            char str[50];

            printf("Enter a string : ");

            scanf("%s",&str);

            strrev(str);

            printf("Reverse String : %s",str);

getch();

}

Output:

Enter a string : hello

Reverse String : olleh
Click Here to Download 

6) strset() in C :

This function replaces all the characters of a string with a given symbol or character.

Syntax :

strset(string,symbol);

Sample program :

str_set.c

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

            char str1[30],str2;

            printf("Enter a string: ");

            gets(str1);

            printf("Enter a symbol to replace the string : ");

            scanf("%c",&str2);

            strset(str1,str2);

            printf("After strset : %s",str1);

            getch();

}

Output:

Enter a string: Good

Enter a symbol to replace the string : *

After strset : ****
Click Here to Download