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diff --git a/182/CH5/EX5.3/5_3.txt b/182/CH5/EX5.3/5_3.txt
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+++ b/182/CH5/EX5.3/5_3.txt
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+3case 1,
+Total current=0.460000 A
+case 2,
+Total current=0.006900 A
diff --git a/182/CH5/EX5.3/example5_3.sce b/182/CH5/EX5.3/example5_3.sce
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+
+//example 5-3 in page 124
+clc;
+// Given data
+// 3(1/2) digit display
+If1=20e-3;//forward current per segment of led=20 mA
+If2=300e-6;//forward current per segment of lcd
+//calculations
+for n=1:2
+    if n==1
+       I=If1;
+       else I=If2;
+    end
+    It=3*7*I+2*I;// each digit has 7 segments and there are three digits with a half digit that has 2 segments
+    printf("case %d,\n Total current=%.0f mA\n",n,It*1000);
+end
+//result
+// case 1,
+//Total current=0.460000 A
+//case 2,
+//Total current=0.006900 A
+ 
+\ No newline at end of file