diff --git a/first/.classpath b/first/.classpath
new file mode 100644
index 0000000..57bca72
--- /dev/null
+++ b/first/.classpath
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/first/.gitignore b/first/.gitignore
new file mode 100644
index 0000000..ae3c172
--- /dev/null
+++ b/first/.gitignore
@@ -0,0 +1 @@
+/bin/
diff --git a/first/.project b/first/.project
new file mode 100644
index 0000000..6ce0ba8
--- /dev/null
+++ b/first/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>first</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/first/.settings/org.eclipse.core.resources.prefs b/first/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000..99f26c0
--- /dev/null
+++ b/first/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8
diff --git a/first/.settings/org.eclipse.jdt.core.prefs b/first/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..8c9943d
--- /dev/null
+++ b/first/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,14 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=17
diff --git a/first/src/first/Hello.java b/first/src/first/Hello.java
new file mode 100644
index 0000000..c39d098
--- /dev/null
+++ b/first/src/first/Hello.java
@@ -0,0 +1,13 @@
+package first;
+
+public class Hello {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		System.out.println("안녕");
+		System.out.println("코드 작성 ");
+		
+	}
+
+}
diff --git a/first/src/first/test.java b/first/src/first/test.java
new file mode 100644
index 0000000..6f95bef
--- /dev/null
+++ b/first/src/first/test.java
@@ -0,0 +1,13 @@
+package first;
+
+
+public class test {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		System.out.println("테스트");
+		
+	}
+
+}
diff --git a/first/src/module-info.java b/first/src/module-info.java
new file mode 100644
index 0000000..e6ac579
--- /dev/null
+++ b/first/src/module-info.java
@@ -0,0 +1,9 @@
+/**
+ * 
+ */
+/**
+ * @author seori
+ *
+ */
+module first {
+}
\ No newline at end of file
diff --git a/upDown.java b/upDown.java
index aa7a416..9fd4fb1 100644
--- a/upDown.java
+++ b/upDown.java
@@ -6,7 +6,7 @@ public class upDown {
 	public static void main(String[] args) {
 		
 		int answer = (int)(Math.random() * 100 + 1);
-		int guess;
+		int guess; //수정
 		int count = 0;
 		Scanner scan = new Scanner(System.in);