diff --git a/Question03-if/.classpath b/Question03-if/.classpath
new file mode 100644
index 0000000..c771657
--- /dev/null
+++ b/Question03-if/.classpath
@@ -0,0 +1,6 @@
+<?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-21"/>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="output" path="build/classes"/>
+</classpath>
diff --git a/Question03-if/.gitignore b/Question03-if/.gitignore
new file mode 100644
index 0000000..84c048a
--- /dev/null
+++ b/Question03-if/.gitignore
@@ -0,0 +1 @@
+/build/
diff --git a/Question03-if/.project b/Question03-if/.project
new file mode 100644
index 0000000..1c2475e
--- /dev/null
+++ b/Question03-if/.project
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question03-if</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.wst.common.project.facet.core.builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/Question03-if/.settings/org.eclipse.jdt.core.prefs b/Question03-if/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..23fa13b
--- /dev/null
+++ b/Question03-if/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,9 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.compliance=21
+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=21
diff --git a/Question03-if/.settings/org.eclipse.wst.common.project.facet.core.xml b/Question03-if/.settings/org.eclipse.wst.common.project.facet.core.xml
new file mode 100644
index 0000000..c1a8d07
--- /dev/null
+++ b/Question03-if/.settings/org.eclipse.wst.common.project.facet.core.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>
diff --git a/Question03-if/src/main/java/Question3_1.java b/Question03-if/src/main/java/Question3_1.java
new file mode 100644
index 0000000..670e557
--- /dev/null
+++ b/Question03-if/src/main/java/Question3_1.java
@@ -0,0 +1,15 @@
+
+public class Question3_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 100;
+		
+		if ( num == 100 ) {
+			System.out.println("条件に合致しました");
+		} 
+
+	}
+
+}
diff --git a/Question03-if/src/main/java/Question3_2.java b/Question03-if/src/main/java/Question3_2.java
new file mode 100644
index 0000000..78b16f9
--- /dev/null
+++ b/Question03-if/src/main/java/Question3_2.java
@@ -0,0 +1,17 @@
+
+public class Question3_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 65;
+		
+		if ( num >= 65 ) {
+			System.out.println("合格です");
+		} else {
+			System.out.println("不合格です");
+		}
+		
+	}
+
+}
diff --git a/Question03-if/src/main/java/Question3_3.java b/Question03-if/src/main/java/Question3_3.java
new file mode 100644
index 0000000..0428220
--- /dev/null
+++ b/Question03-if/src/main/java/Question3_3.java
@@ -0,0 +1,15 @@
+
+public class Question3_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 10;
+		
+		if ( (num % 2 == 0 ) && ( num % 5 == 0 ) ) {
+			System.out.println(num+"は"+2+"でも"+5+"でも割り切れます");
+		}
+
+	}
+
+}
diff --git a/Question03-if/src/main/java/Question3_4.java b/Question03-if/src/main/java/Question3_4.java
new file mode 100644
index 0000000..0e83531
--- /dev/null
+++ b/Question03-if/src/main/java/Question3_4.java
@@ -0,0 +1,26 @@
+import java.util.Scanner;
+
+public class Question3_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		System.out.println("降水確率を入力してください。（数字のみ）");
+		
+		Scanner sc = new Scanner(System.in);
+		int num = Integer.parseInt(sc.nextLine());
+		sc.close();
+		
+		if ( (num<0) || (num>100) ) {
+			System.out.println("不正な値が入力されました");
+		} else if ( num >= 75 ) {
+			System.out.println("雨が降る確率が高いです");
+		} else if ( (num<75) && (num>=30) ) {
+			System.out.println("雨が降るかもしれないです");
+		} else {
+			System.out.println("雨はまず降らないでしょう");
+		}
+
+	}
+	
+}