diff --git a/jishu-yadav.array1.c b/jishu-yadav.array1.c
new file mode 100644
index 0000000..4a9a599
--- /dev/null
+++ b/jishu-yadav.array1.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+{
+  int main()
+  {
+    int a[]={5,3,4,1,2};  
+    int i;
+    for(i=0;i<=4;i++)
+    { 
+        int t=0;
+       for(int j=i+1;j<=4;j++)   
+        {
+         if(a[j]>a[i])   
+            {
+              t=a[i];
+              a[i]=a[j];
+              a[j]=t;
+            }
+         }
+     }for(int i=0;i<=4;i++)
+      {
+      printf("%d ",a[i]);   
+      }
+   }
+}
diff --git a/jishu-yadav.disarium.c b/jishu-yadav.disarium.c
new file mode 100644
index 0000000..e253ec4
--- /dev/null
+++ b/jishu-yadav.disarium.c
@@ -0,0 +1,28 @@
+#include<stdio.h>
+#include<Math.h>
+int main()
+{    
+     int num;
+     scanf("%d ",&num);
+     int s=0,k=0,no=num,i=0; 
+       while(no>0)
+       {   
+        k++;
+        no=no/10;
+        }
+       int n=num;
+       while(n>0)
+       {
+         i=n%10;
+         s=(int)(pow(i,k)+s);
+         k--;
+           n=n/10;
+        }
+       if(s==num)
+        printf("\nno. is disarium");
+        else
+        printf("\n no. is not disarium");
+
+}
+
+
diff --git a/jishu-yadav.evil_no.c b/jishu-yadav.evil_no.c
new file mode 100644
index 0000000..60fca74
--- /dev/null
+++ b/jishu-yadav.evil_no.c
@@ -0,0 +1,19 @@
+#include<stdio.h>
+int main()
+{ 
+     int s=0,n; 
+     scanf("%d ",&n);
+     while(n>0)
+     {
+        int r=n%2;   
+         s=r+s;  
+         n=n/2;
+      }
+      if(s%2==0)
+       printf("no. is evil");
+       else 
+       printf("no is not evil");
+
+}
+
+
diff --git a/jishu-yadav.pronic_no.c b/jishu-yadav.pronic_no.c
new file mode 100644
index 0000000..f2217b8
--- /dev/null
+++ b/jishu-yadav.pronic_no.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+int main()
+{
+       int r=0,i,n;
+       scanf("%d ",&n);
+       for(i=1;i<n;i++)
+      {
+        if((n%i)==0);
+         {
+          r=n/i;
+          }
+
+         if(r*(r+1)==n)
+         {
+             printf("num.is pronic");
+          }
+   }
+