diff --git a/File_handling/duplicate.txt b/File_handling/duplicate.txt
new file mode 100644
index 0000000..9f241c6
--- /dev/null
+++ b/File_handling/duplicate.txt
@@ -0,0 +1,10 @@
+This is my first attempt in c++
+hello world
+thiis is my third line 
+and fourth line
+and fifth line
+and 
+so
+on 
+this ia again 
+
diff --git a/File_handling/duplicate_text_file.cpp b/File_handling/duplicate_text_file.cpp
new file mode 100644
index 0000000..fa3ac41
--- /dev/null
+++ b/File_handling/duplicate_text_file.cpp
@@ -0,0 +1,22 @@
+// program to create duplicate of sameer.txt file
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ifstream object;
+	ofstream object1;
+	char ch;
+	object.open("sameer.txt");  // member function of ofstream class
+	object1.open("PRN");
+	while(!object.eof())
+		{
+		  object.get(ch);
+		  object1<<ch;
+		}
+	object.close();  //member function of ofstream class
+	object1.close();
+	
+	return 0;
+	
+}
diff --git a/File_handling/eof_single_char_read.cpp b/File_handling/eof_single_char_read.cpp
new file mode 100644
index 0000000..b405e3f
--- /dev/null
+++ b/File_handling/eof_single_char_read.cpp
@@ -0,0 +1,17 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ifstream object;
+	char ch;
+	object.open("sameer.txt");  // member function of ofstream class
+	while(!object.eof())
+		{
+		  object.get(ch);
+		  cout<<ch;
+		}
+	object.close();  //member function of ofstream class
+	return 0;
+	
+}
diff --git a/File_handling/file-2-file_modes.cpp b/File_handling/file-2-file_modes.cpp
new file mode 100644
index 0000000..669b1f9
--- /dev/null
+++ b/File_handling/file-2-file_modes.cpp
@@ -0,0 +1,12 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ofstream object;
+	object.open("sameer.txt",ios::app);  // file modes
+	object<<"hello world";
+	object.close();  //member function of ofstream class
+	return 0;
+	
+}
diff --git a/File_handling/file1.cpp b/File_handling/file1.cpp
new file mode 100644
index 0000000..82aee1d
--- /dev/null
+++ b/File_handling/file1.cpp
@@ -0,0 +1,12 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ofstream object;
+	object.open("sameer.txt");  // member function of ofstream class
+	object<<"hello world";
+	object.close();  //member function of ofstream class
+	return 0;
+	
+}
diff --git a/File_handling/file_read_text_file.cpp b/File_handling/file_read_text_file.cpp
new file mode 100644
index 0000000..2923b3c
--- /dev/null
+++ b/File_handling/file_read_text_file.cpp
@@ -0,0 +1,14 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ifstream object;
+	char str[900];
+	object.open("sameer.txt");  // member function of ofstream class
+	object>>str;
+	cout<<str;
+	object.close();  //member function of ofstream class
+	return 0;
+	
+}
diff --git a/File_handling/file_text_getline.cpp b/File_handling/file_text_getline.cpp
new file mode 100644
index 0000000..30fee9c
--- /dev/null
+++ b/File_handling/file_text_getline.cpp
@@ -0,0 +1,16 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ifstream object;
+	char str[900];
+	object.open("sameer.txt");  // member function of ofstream class
+	object.getline(str,900);  // read a line 
+	cout<<str;
+	object.getline(str,900);  // read a line 
+	cout<<str;
+	object.close();  //member function of ofstream class
+	return 0;
+	
+}
diff --git a/File_handling/multi+spaces.cpp b/File_handling/multi+spaces.cpp
new file mode 100644
index 0000000..1621946
--- /dev/null
+++ b/File_handling/multi+spaces.cpp
@@ -0,0 +1,24 @@
+// program to remove multiple spaces from the text file
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ifstream object;
+	char ch;
+	int count =0;
+	object.open("sameer.txt");  // member function of ofstream class
+	while(!object.eof())
+		{
+		  object.get(ch);
+		  if(ch==' ')
+		  	count++;
+		  else
+		    count=0;
+		 if(count<=1)   
+		 	cout<<ch;
+		}
+	object.close();  //member function of ofstream class
+	return 0;
+	
+}
diff --git a/File_handling/sameer.txt b/File_handling/sameer.txt
new file mode 100644
index 0000000..9883fde
--- /dev/null
+++ b/File_handling/sameer.txt
@@ -0,0 +1,9 @@
+This                   my    first          attempt in            c++
+hello    world
+thiis is      my third line 
+and fourth      line
+and             fifth line
+and 
+so
+on 
+this ia             again 
diff --git a/array/array-2.cpp b/array/array-2.cpp
new file mode 100644
index 0000000..a64ce58
--- /dev/null
+++ b/array/array-2.cpp
@@ -0,0 +1,18 @@
+/*  array declaration + initialization method
+*/
+
+#include<iostream>
+#include<stdlib.h>
+#include<iomanip>
+
+#define random(num)   rand()%num
+
+using namespace std;
+int main(){
+	int a[10]={10,20,30,40,60};
+	
+	// output phase
+	for(int i=0;i<10;i++)
+		cout<<setw(10)<<a[i];
+	return 0;
+}
diff --git a/array/array-3.cpp b/array/array-3.cpp
new file mode 100644
index 0000000..d500e62
--- /dev/null
+++ b/array/array-3.cpp
@@ -0,0 +1,30 @@
+/*  array declaration + initialization from keyboard
+*/
+
+#include<iostream>
+#include<stdlib.h>
+#include<iomanip>
+
+using namespace std;
+int main(){
+	int a[10];
+	int i;
+	//input phase
+	for(i=0;i<10;i++)
+	{
+		cout<<"\n Enter a["<<i+1<<"] number ";
+		cin>>a[i];
+	}
+	
+	//processing phase
+	int sum =0;
+	for(i=0;i<10;i++)
+		sum = sum+a[i];
+	
+	// output phase
+	cout<<"\n Entered array :";
+	for(i=0;i<10;i++)
+		cout<<setw(10)<<a[i];
+	cout<<"\n Sum of all elements :"<<sum;
+	return 0;
+}
diff --git a/array/array.cpp b/array/array.cpp
index 9050f2e..0eb71df 100644
--- a/array/array.cpp
+++ b/array/array.cpp
@@ -1,14 +1,15 @@
 #include<iostream>
 #include<stdlib.h>
+#include<iomanip>
 
-#define random(num)   rand()%100
+#define random(num)   rand()%num
 
 using namespace std;
 int main(){
 	int a[10],i;
 	//input phase 
 	for(i=0;i<10;i++)
-		a[i] = random(100);
+		a[i] = random(10);
 	// output phase
 	for(i=0;i<10;i++)
 		cout<<setw(10)<<a[i];
diff --git a/array/fun_array-1.cpp b/array/fun_array-1.cpp
new file mode 100644
index 0000000..3a6a898
--- /dev/null
+++ b/array/fun_array-1.cpp
@@ -0,0 +1,38 @@
+/*  array declaration + initialization from keyboard
+*/
+
+#include<iostream>
+#include<stdlib.h>
+#include<iomanip>
+
+using namespace std;
+
+int fun_add(int a){
+	a = a+10;
+	return(a);
+}
+
+int main(){
+	int a[10];
+	int i;
+	
+	//input phase
+	for(i=0;i<10;i++)
+	{
+		cout<<"\n Enter a["<<i+1<<"] number ";
+		cin>>a[i];
+	}
+	
+	//processing phase
+	
+	for(i=0;i<10;i++)
+		a[i] = fun_add(a[i]);
+	
+	// output phase
+	
+	cout<<"\n Modified array :";
+	for(i=0;i<10;i++)
+		cout<<setw(10)<<a[i];
+
+	return 0;
+}
diff --git a/array/fun_array-2.cpp b/array/fun_array-2.cpp
new file mode 100644
index 0000000..a3ac0bf
--- /dev/null
+++ b/array/fun_array-2.cpp
@@ -0,0 +1,39 @@
+/*  array declaration + initialization from keyboard
+*/
+
+#include<iostream>
+#include<stdlib.h>
+#include<iomanip>
+
+using namespace std;
+
+void fun_add(int a[10]){
+	int i;
+	for(i=0;i<10;i++)
+		a[i] = a[i]+10;
+	
+}
+
+int main(){
+	int a[10];
+	int i;
+	
+	//input phase
+	for(i=0;i<10;i++)
+	{
+		cout<<"\n Enter a["<<i+1<<"] number ";
+		cin>>a[i];
+	}
+	
+	//processing phase
+	
+	fun_add(a);
+	
+	// output phase
+	
+	cout<<"\n Modified array :";
+	for(i=0;i<10;i++)
+		cout<<setw(10)<<a[i];
+
+	return 0;
+}
diff --git a/array/increment_by_10.cpp b/array/increment_by_10.cpp
new file mode 100644
index 0000000..8ff7352
--- /dev/null
+++ b/array/increment_by_10.cpp
@@ -0,0 +1,32 @@
+/*  array declaration + initialization from keyboard
+*/
+
+#include<iostream>
+#include<stdlib.h>
+#include<iomanip>
+
+using namespace std;
+int main(){
+	int a[10];
+	int i;
+	//input phase
+	for(i=0;i<10;i++)
+	{
+		cout<<"\n Enter a["<<i+1<<"] number ";
+		cin>>a[i];
+	}
+	
+	//processing phase
+	
+	for(i=0;i<10;i++)
+		a[i]+=10;    //shortand operator a[i] = a[i]+10
+		
+	
+	// output phase
+	
+	cout<<"\n Modified array :";
+	for(i=0;i<10;i++)
+		cout<<setw(10)<<a[i];
+
+	return 0;
+}
diff --git a/array/sum_element.cpp b/array/sum_element.cpp
new file mode 100644
index 0000000..d500e62
--- /dev/null
+++ b/array/sum_element.cpp
@@ -0,0 +1,30 @@
+/*  array declaration + initialization from keyboard
+*/
+
+#include<iostream>
+#include<stdlib.h>
+#include<iomanip>
+
+using namespace std;
+int main(){
+	int a[10];
+	int i;
+	//input phase
+	for(i=0;i<10;i++)
+	{
+		cout<<"\n Enter a["<<i+1<<"] number ";
+		cin>>a[i];
+	}
+	
+	//processing phase
+	int sum =0;
+	for(i=0;i<10;i++)
+		sum = sum+a[i];
+	
+	// output phase
+	cout<<"\n Entered array :";
+	for(i=0;i<10;i++)
+		cout<<setw(10)<<a[i];
+	cout<<"\n Sum of all elements :"<<sum;
+	return 0;
+}