Java Programming thought notes (Control execution flow)

1.true and false: Java does not allow us to use a number as a Boolean value. If you want to use a non-Boolean value in a Boolean test, the if (a) must first be converted to a Boolean if (a!=0) with a conditional expression.

2.if-else:

3. Iteration:while, Do-while, for (the variable c is defined where the program uses it, that is, in the control expression for the For loop, not in the place where main () begins. The scope of C is within the range of the for-control expression) the comma operator (by using the comma operator, you can define multiple variables within the FOR statement [the only place to use])

4.Foreach Syntax:for (float x:f)//This statement defines a variable x of type float, and then assigns the element of each F to X.

5.return: on the one hand, specify what value a method returns (assuming it has no void return value), on the other hand it causes the current method to exit and return that value.

6.break and Continue:

7.goto: A reserved word for Java, but it is not used in the language; Java has no goto

8.switch: a neat way to implement multiple choices; requires a selection factor, and must be an integer value such as int and char.

Java Programming thought notes (Control execution flow)