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+//             Example 9.4 
+//Write a program with function power that computes x raised to the power y.
+funcprot(0);
+function p = power(x,y)
+     p=1.0;               // x to power 0
+    if((y>=0)) then
+        while(y)         //computes positive powers
+            p=p*x;
+            y=y-1;
+        end
+    else
+        while(y)       //computes negative powers
+            p=p/x;
+            y=y+1;
+        end
+    end
+endfunction
+disp("Enter x,y:");
+disp("[Enter in single line seperated by space] ");
+[x,y]=scanf("%d %d");    //input using scanf function
+
+//calling power() function and printing its output
+printf("%d to the power %d is %f",x,y,power(x,y));