diff --git a/education/software development/ECE1400/Chapter 3 Exercises.md b/education/software development/ECE1400/Chapter 3 Exercises.md
index 963eed8..474cbaa 100644
--- a/education/software development/ECE1400/Chapter 3 Exercises.md	
+++ b/education/software development/ECE1400/Chapter 3 Exercises.md	
@@ -5,4 +5,15 @@ c. `83.1620`
 d. `1e-06 `
 
 # 2.
-a. `printf`
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+```c
+float x = 0.12345;
+// a
+printf("%-8.1f", x);
+// b
+printf("%10.6f", x);
+// c
+printf("%8.3f", x);
+// d
+printf("%-6.0g", x);
+```
+c. 
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