1. Controlling Program Flow
Chapter 3
Controlling Program Flow
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2. What’s Inside
1、Operators
2、Execution control
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10. Comments
• The three permissible styles of comment in a Java technology program are:
// comment on one line
/* comment on one or more lines */
/** documentation comment */
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11. Semicolons, Blocks, and White Space
• A statement is one or more lines of code terminated by a semicolon (;):
Example:
totals = a + b + c
+ d + e + f;
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12. Semicolons, Blocks, and White Space
• A block is a collection of statements bound by opening and closing braces: {
x = y + 1;
y = x + 1; }
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13. Semicolons, Blocks, and White Space
• You must use a block in a class definition:
public class MyDate {
private int day;
private int month;
private int year; }
• You can nest block statements.
• Any amount of white space is allowed in a Java program.
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15. if & if-else
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19. while & for
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