diff --git a/csci218/Lect/ex6inClass.c b/csci218/Lect/ex6inClass.c
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+++ b/csci218/Lect/ex6inClass.c
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+/* simple statement example  ex6InClass.c 
+By Dr. Xu
+This program is for explaining the building blocks of C
+*/
+
+# include <stdio.h>    //For accessing the standard library functions
+# include <math.h>
+
+int main() {
+    /*  literals: 5, 6, 3, 3.14, "James", '!'
+        Variables: a, b, c, name, punc
+        Constant: PI
+        Expressions: a + b * 3, a + 6
+        function: printf()
+        datatype: int, char, float
+    */
+        
+        //variable declaration ;
+           // variable assignment 
+  int a, b;       // variable assignment
+         //variable declaration and initialization
+  a = 5;
+  b = a + 5;
+  float c = 1.5;
+
+  const float PI = 3.1415926;
+
+  c = PI * pow(b, 2.0);
+
+    
+  printf("a = %d\nb = %d\nc = %.3f\nPI = %.3f\n", a, b, c, PI);
+
+  char stName[] = "James";
+  char punc = '!';
+
+  printf("Good Bye, %s%c\n", stName, punc);
+    
+    //printf("Good bye, %s %c \n", name, punc);
+    return 0;
+}
diff --git a/csci218/Lect/ex6inClass.out b/csci218/Lect/ex6inClass.out
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