exam2 + remaining files of the semester

Exam1/Exam2021_1_Feedback.jl

@@ -0,0 +1,22 @@
+ 
+using Printf
+include("jlFiles/printmat.jl")
+
+println("Three ways of doing the same thing")
+
+fp = [1   2;
+      1.1 2.1]
+
+x1 = fp*10                     #easiest and fastest
+printmat(x1)
+
+x2 = map(i->fp[:,i]*10,1:2)   #cumbersome
+x2 = hcat(x2...)
+printmat(x2)
+
+x3 = zeros(size(fp))          #even more cumbersome
+for i=1:size(fp,1),j=1:size(fp,2)
+  x3[i,j] = fp[i,j]*10
+end
+printmat(x3)
+