diff --git a/NISHTHA KOHLI/Basics of programming/armstrong.cpp b/NISHTHA KOHLI/Basics of programming/armstrong.cpp
new file mode 100644
index 0000000..65af150
--- /dev/null
+++ b/NISHTHA KOHLI/Basics of programming/armstrong.cpp	
@@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int n, a[25];
+	cin>>n;
+	for(int i=0;i<n;i++){
+		cin>>a[i];
+	}
+	for(int i=0;i<n;i++){
+		for(int j=i+1;j<n;j++){
+			if(a[j]==a[i]){
+				cout<<a[i];
+			}
+		}
+	}
+}
diff --git a/NISHTHA KOHLI/Basics of programming/pattern 1.cpp b/NISHTHA KOHLI/Basics of programming/pattern 1.cpp
new file mode 100644
index 0000000..a62cafd
--- /dev/null
+++ b/NISHTHA KOHLI/Basics of programming/pattern 1.cpp	
@@ -0,0 +1,15 @@
+#include <iostream>
+using namespace std;
+
+int main(int argc, char **argv){
+    int n;
+    cin >> n;
+    
+   for(int i=1;i<=n;i++){
+       for(int j=1;j<=i;j++){
+           cout<<"*\t";
+       }
+       cout<<endl;
+   }
+   
+}
diff --git a/NISHTHA KOHLI/Basics of programming/pattern 2.cpp b/NISHTHA KOHLI/Basics of programming/pattern 2.cpp
new file mode 100644
index 0000000..f1d1db3
--- /dev/null
+++ b/NISHTHA KOHLI/Basics of programming/pattern 2.cpp	
@@ -0,0 +1,15 @@
+#include <iostream>
+using namespace std;
+
+int main(int argc, char **argv){
+    int n;
+    cin >> n;
+    
+    for(int i=1;i<=n;i++){
+        for(int j=i;j<=n;j++){
+            cout<<"*\t";
+        }
+        cout<<endl;
+    }
+    
+}
diff --git a/NISHTHA KOHLI/Basics of programming/pattren 3.cpp b/NISHTHA KOHLI/Basics of programming/pattren 3.cpp
new file mode 100644
index 0000000..297d25f
--- /dev/null
+++ b/NISHTHA KOHLI/Basics of programming/pattren 3.cpp	
@@ -0,0 +1,21 @@
+#include <iostream>
+using namespace std;
+
+int main(int argc, char **argv){
+    int n;
+    cin >> n;
+    
+   int sp=n-1;
+   int st=1;
+   for(int i=1;i<=n;i++){
+       for(int j=1;j<=sp;j++){
+           cout<<"\t";
+       }
+       for(int j=1;j<=st;j++){
+           cout<<("*\t");
+       }
+       sp--;
+       st++;
+       cout<<endl;
+   }
+}