c Program to Concatenate Two Strings without using strcat()

// Program to Concatenate Two Strings without using strcat()
#include <stdio.h>
#include <conio.h>
#include <string.h>
main()
{
char string1[30], string2[20];
int i, length=0, temp;
printf("Enter the Value of String1: \n");
gets(string1);
printf("\nEnter the Value of String2: \n");
gets(string2);
for(i=0; string1[i]!='\0'; i++)
length++;
temp = length;
for(i=0; string2[i]!='\0'; i++)
{
string1[temp] = string2[i];
temp++;
}
string1[temp] = '\0';
printf("\nThe concatenated string is:\n");
puts(string1);
getch();
}


Concatenation of strings means taking two strings and joining them sequentially into one. For example, you can use the + operator to concatenate two strings:

var str1:String = "green";
var str2:String = "ish";
var str3:String = str1 + str2; // str3 == "greenish"