2.5.5 Prompting the User for Input
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System.out.print("Enter first integer: "); // prompt
uses System.out.print to display the message "Enter first integer: ". This message is called a prompt because it directs the user to take a specific action. We use method print here rather than println so that the user’s input appears on the same line as the prompt. Recall from Section 2.2 that identifiers starting with capital letters typically represent class names. Class System is part of package java.lang. Notice that class System is not imported with an import declaration at the beginning of the program.
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