diff --git a/level1/act1.c b/level1/act1.c
index e69de29..6dec6e5 100644
--- a/level1/act1.c
+++ b/level1/act1.c
@@ -0,0 +1,50 @@
+#include<stdio.h>
+
+void inputTemperatures(int n, float temps[n])
+{
+    for(int i=0;i<n;i++){
+        printf("Enter the temperature of day %d of the week: ",i+1);
+        scanf("%f",&temps[i]);
+    }
+}
+float findHighest(int n, float temps[n])
+{
+    float max= temps[0];
+    for(int i=0;i<n;i++){
+        if(temps[i]>max){
+            max=temps[i];
+        }
+    }
+    return max;
+}
+float findLowest(int n, float temps[n])
+{
+    float min=temps[0];
+    for(int i=0;i<n;i++){
+        if(temps[i]<min){
+            min=temps[i];
+        }
+    } 
+    return min;
+}
+void output(float max, float min)
+{
+    printf("The highest temperature recorded is %.2f\n",max);
+    printf("The lowest temperature recorded is %.2f",min);
+}
+
+int main()
+{
+    int n=7;
+    float temps[n],max,min;
+
+    inputTemperatures(n,temps);
+
+    max=findHighest(n,temps);
+    min=findLowest(n,temps);
+
+    output(max,min);
+
+    return 0;
+
+}
\ No newline at end of file
diff --git a/level1/act2.c b/level1/act2.c
index e69de29..71cd4a3 100644
--- a/level1/act2.c
+++ b/level1/act2.c
@@ -0,0 +1,29 @@
+#include<stdio.h>
+
+struct ElectricityBill{
+    int units;
+    float rate;
+    float total_bill;
+};
+
+typedef struct ElectricityBill Ebill;
+
+Ebill input()
+{
+    Ebill bill;
+    printf("Enter number of units consumed: ");
+    scanf("%d",&bill.units);
+    printf("Enter rate per unit: ");
+    scanf("%f",&bill.rate);
+    return bill;
+}
+
+Ebill calculate_bill(Ebill bill)
+{
+    bill.total_bill=bill.units*bill.rate;
+
+    if(bill.units>100){
+        int extra_units=bill.units-100;
+        float extra_charge=extra_units*5.0;
+    }
+}
diff --git a/level1/demo1.c b/level1/demo1.c
index e69de29..bc490a7 100644
--- a/level1/demo1.c
+++ b/level1/demo1.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+
+void input(int n, float arr[n])
+{
+    for(int i=0;i<n;i++)
+    {
+        printf("Enter the value of element %d: ",i+1);
+        scanf("%f",&arr[i]);
+    }
+}
+
+int find_max_index(int n, float arr[n])
+{
+    int max_index=0;
+    for(int i=0;i<n;i++)
+    {
+        if(arr[i]>arr[max_index]){
+        max_index=i;
+        }
+    }
+    return max_index;
+}
+
+void output(int max_index, float arr[])
+{
+    printf("Maximum value in the array is %.2f at index %d",arr[max_index],max_index);
+}
+
+int main()
+{
+    int n,max_index;
+    printf("Enter the value of n:");
+    scanf("%d",&n);
+    float arr[n];
+    input(n,arr);
+    max_index= find_max_index(n,arr);
+    output(max_index,arr);
+    return 0;
+}
\ No newline at end of file
diff --git a/level1/demo2.c b/level1/demo2.c
index e69de29..1d9cb3b 100644
--- a/level1/demo2.c
+++ b/level1/demo2.c
@@ -0,0 +1,52 @@
+#include<stdio.h>
+
+struct rectangle{
+    char name[50];
+    float length;
+    float width;
+    float area;
+};
+
+typedef struct rectangle Rectangle;
+
+Rectangle input(int rectNum)
+{
+    Rectangle rect;
+    printf("Enter the name for the rectangle %d: ",rectNum);
+    scanf("%s",rect.name);
+    printf("Enter the length and width of rectangle %s: ",rect.name);
+    scanf("%f%f",&rect.length,&rect.width);
+    return rect;
+}   
+
+float calculate_area(Rectangle rect)
+{
+    return(rect.length*rect.width);
+}
+
+void compare_areas(Rectangle r1, Rectangle r2, Rectangle r3)
+{
+    if(r1.area>r2.area && r1.area>r3.area)
+    {
+        printf("Area of rectangle 1 which is %.2f is the largest.",r1.area);
+    }
+    else if(r2.area>r3.area)
+    {
+        printf("Area of rectangle 2 whcih is %.2f is the largest.",r2.area);
+    }
+    else
+    {
+        printf("Area of rectangle 3 which is %.2f is the largest.",r3.area);
+    }
+}
+
+int main()
+{
+    Rectangle r1=input(1);
+    Rectangle r2=input(2);
+    Rectangle r3=input(3);
+    r1.area=calculate_area(r1);
+    r2.area=calculate_area(r2);
+    r3.area=calculate_area(r3);
+    compare_areas(r1,r2,r3);
+}
\ No newline at end of file
diff --git a/level1/demo3.c b/level1/demo3.c
index e69de29..0a10b93 100644
--- a/level1/demo3.c
+++ b/level1/demo3.c
@@ -0,0 +1,55 @@
+#include<stdio.h>
+
+struct rectangle{
+    float length;
+    float width;
+    float area;
+};
+
+typedef struct rectangle Rectangle;
+
+void input(int n, Rectangle rects[n])
+{
+    for(int i=1;i<=n;i++){
+    printf("Enter the length and width of Rectangle %d: ",i);
+    scanf("%f%f",&rects[i].length,&rects[i].width);
+    }
+}
+
+void calculate_area(int n, Rectangle rects[n])
+{
+    for(int i=1;i<=n;i++){
+    rects[i].area=rects[i].length*rects[i].width;
+    }
+}
+
+int find_largest_index(int n, Rectangle rects[n])
+{
+    int largest_index=0;
+    for(int i=1;i<=n;i++){
+        if(rects[i].area>rects[largest_index].area){
+            largest_index=i;
+        }
+    }
+    return largest_index;
+}
+
+void output(int largest_index, Rectangle rects[])
+{
+    printf("The rectangle with the largest area is at index %d with area %.2f",largest_index,rects[largest_index].area);
+}
+
+int main()
+{
+    int n;
+    printf("Enter the number of rectangles: ");
+    scanf("%d",&n);
+    
+    Rectangle rects[n];
+    input(n,rects);
+    calculate_area(n,rects);
+
+    int largest_index=find_largest_index(n,rects);
+    output(largest_index,rects);
+    return 0;
+}
\ No newline at end of file
diff --git a/level1/demo4.c b/level1/demo4.c
index e69de29..94a0797 100644
--- a/level1/demo4.c
+++ b/level1/demo4.c
@@ -0,0 +1,23 @@
+#include<stdio.h>
+
+struct flight{
+    int flight_number;
+    char destination[20];
+    int available_seats;
+};
+
+typedef struct flight Flight;
+
+void readFlights(int n, Flight f[])
+{
+    for(int i=0;i<n;i++)
+    {
+    printf("Flight %d details:",i+1);
+    printf("Flight number: ");
+    scanf("%d",&f[i].flight_number);
+    printf("Flight destination: ");
+    scanf("%s",&f[i].destination);
+    printf("Available seats: ");
+    scanf("%d",&f[i].available_seats);
+    }
+}
\ No newline at end of file
diff --git a/level1/demo5.c b/level1/demo5.c
index e69de29..ded3729 100644
--- a/level1/demo5.c
+++ b/level1/demo5.c
@@ -0,0 +1,52 @@
+#include<stdio.h>
+
+void read_array(int n, int arr[])
+{
+    for(int i=0;i<n;i++){
+        printf("Enter the element at index %d: ",i+1);
+        scanf("%d",&arr[i]);
+    }
+}
+void print_array(int n, int arr[])
+{
+    for(int i=0;i<n;i++){
+        printf("%d ",arr[i]);
+    }
+    printf("\n");
+}
+void swap_array(int n, int a[n], int b[n])
+{
+    int temp[n];
+    for(int i=0;i<n;i++){
+        temp[i]=a[i];
+        a[i]=b[i];
+        b[i]=temp[i];
+    }
+}
+int main()
+{
+    int n, arr[n], a[n], b[n];
+    printf("Enter the  size of the arrays: ");
+    scanf("%d",&n);  
+
+    printf("Enter the elements of array 1:\n");
+    read_array(n,a);
+    printf("Enter the elements of array 2:\n");
+    read_array(n,b);
+
+    printf("Array 1 elements before swapping: ");
+    print_array(n,a);
+    printf("Array 2 elements before swapping: ");
+    print_array(n,b);
+
+    swap_array(n,a,b);
+
+    printf("Array 1 after swapping: ");
+    print_array(n,a);
+    printf("Array 2 after swapping: ");
+    print_array(n,b);
+
+    return 0;
+}
+
+