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education/computer engineering/ECE1400/Chapter 6 Exercises.md

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+> 1. What output does the following program fragment produce?
+```c
+i = 1;
+while (i <= 128) {
+	printf("%d ", i);
+	i *= 2;
+}
+```
+
+Output:
+```
+1 2 4 8 16 32 64 128
+```
+
+> 2. What output does the following program fragment produce?
+```c
+i = 9384
+do {
+	printf("%d ", i);
+	i /= 10;
+} while (i <= 128);
+```
+
+Output:
+```
+9384 938 93 9
+```
+
+> 3. What output does the following `for` statement produce?
+```c
+for (i = 5, j = i - 1; i > 0, j > 0; --i, j = i - 1)
+	printf("%d ", i);
+```
+
+Output:
+```
+5 4 3 2
+```
+
+> 4. Which one of the following statements is not equivalent to the other two (assuming that the loop bodies are the same?)
+```c
+for (i = 0; i < 10; i++) // (a)
+for (i = 0; i < 10; ++i) // (b)
+for (i = 0; i ++ < 10; ) // (c)
+```
+
+Answer:
+C is not the same as A and B, because the increment takes place before the loop body is executed.
+
+> 5. Which one of the following statements is not equivalent to the other two (assuming that the loop bodies are the same)?
+```c
+while (i < 10) {...} // (a)
+for (; i < 10;) {...} // (b)
+do {...} while (i < 10); // (c)
+```
+
+Answer:
+C is not the same as A and B, because the block is executed before the condition is checked.