prime numbers using function c-basics

Author: kartikgandhi

primenosfun.c

@@ -0,0 +1,29 @@
+#include<stdio.h>
+void prime();
+void main()
+{
+int n;
+printf("Enter the number");
+scanf("%d",&n);
+prime(n);
+}
+
+void prime(int a)
+{
+    if (a==1)
+    {
+        printf("Neither prime nor composite");
+    }
+    else if(a==2||a==3||a==5||a==7)
+    {
+        printf("Prime");
+    }
+    else if(a%2==0||a%3==0||a%5==0||a%7==0)
+    {
+        printf("NOT PRIME");
+    }
+    else
+    {
+        printf("PRIME");
+    }
+}