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Statements and ExpressionsComputer programs are a set of instructions that tell the computer what to do. Each of these instructions is called a statement. The following example from a Java program is a statement: int HighScore = 400000; You can use brackets to group a set of statements together in a Java program. These groupings are called block statements. Consider the following portion of a program: 1: public static void main(String[] arguments) { 2: int a = 3; 3: int b = 4; 4: int c = 8 * 5; 5: } Lines 2–4 of this example are a block statement. The opening bracket on Line 1 denotes the beginning of the block, and the closing bracket on Line 5 denotes the end of the block. Some statements are called expressions because they involve a mathematical expression and produce a result. Line 4 in the preceding example is an expression because it sets the value of the c variable equal to 8 multiplied by 5. You'll be working with several different types of expressions throughout the coming sections. |
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