day 1

Author: Harshilbhardwaj47

DAY1/HELLOWORLD/helloworld.java

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+package DAY1;
+
+public class helloworld {
+	public static void main(String[] args) {
+		System.out.println("HELLO WORLD");// here System.out.println is a out put statement like cout or printf in cpp
+											// and c respectively
+	}
+
+}
+

DAY1/MORE_ABOUT_OUTPUT_STATEMENT/first.java

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+package DAY1;
+
+public class first {
+	public static void main(String[] args) {
+		System.out.println("HELLO");// first statement
+		// here if you see print is occupied with ln
+		// it means that it will automatically switch or change lines after first
+		// statement
+		// and will print second statement
+		System.out.println("WORLD");
+		// so your OUTPUT WILL BE
+		// HELLO
+		// WORLD
+		// like this
+	}
+}
+

DAY1/MORE_ABOUT_OUTPUT_STATEMENT/second.java

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+
+
+package DAY1;
+
+public class second {
+	public static void main(String[] args) {
+		System.out.println("HELLO");// first statement
+		// here after reading and seeing the first.java file you must have realized by
+		// know that after printing HELLO java will change and start printing from next
+		// line
+		// first it will print -> HELLO
+		System.out.print("***");// second statement
+		// now if you see second statement do not have ln after print so her it will not
+		// change line and start printing the third statement after the second statement
+		// second it will be-> HELLO
+		//                     ***
+		System.out.println("WORLD");// third statement
+		// and now the third statement will execute and start printing the statement
+		// from the same line from where it left the second statement
+		// third will be->HELLO
+		//                ***WORLD
+		// now it will change line to print the fourth statement but its not there 
+		// so the program will terminate and this is how the output will be printed
+	}
+}
+

DAY1/MORE_ABOUT_OUTPUT_STATEMENT/third.java

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+package DAY1;
+
+public class third {
+	public static void main(String[] args) {
+		System.out.printf("HELLO %s!%n", "WORLD");
+		// A bonus formating statement
+		// here you can see that i have putten ! between HELLO and WORLD but
+		// here is the surprise the output will be
+		// -> HELLO WORLD!
+		// we will discuss on this formating statement in future because its pretty
+		// complex in java
+		// so till them try to find about it more that why i called it a bonus
+	}
+}
+

DAY1/Task/task1.txt

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+Objective
+In this challenge, you'll work with arithmetic operators. Check out the Tutorial tab for learning materials and an instructional video!
+
+Task
+Given the meal price (base cost of a meal), tip percent (the percentage of the meal price being added as tip), and tax percent (the percentage of the meal price being added as tax) for a meal, find and print the meal's total cost.
+
+Note: Be sure to use precise values for your calculations, or you may end up with an incorrectly rounded result!
+
+Input Format
+
+There are  lines of numeric input:
+The first line has a double,MEALCOST(the cost of the meal before tax and tip).
+The second line has an integer,TIPPERCENT(the percentage of MEALCOST being added as tip).
+The third line has an integer,TACPERCENT(the percentage of MEALCOST being added as tax).
+
+Output Format
+
+Print the total MEALCOST, where TOTALCOST is the rounded integer result of the entire bill (MEALCOST with added tax and tip).
+
+Sample Input
+
+12.00
+20
+8
+Sample Output
+
+15

DAY1/VARIABLES/variable1.java

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+package DAY1;
+
+public class variable1 {
+
+	public static void main(String[] args) {
+		int xyz = 21;// we all know about int here xyz is variable that holds 21
+		String abc = "HELLO WORLD";// here String abc holds HELLO WORLD
+		long A = 2;// long hnn this might be new for you all this is used n place of int because
+					// Sometimes the numbers are so large that exceeds so long is used to take care
+					// of that
+		System.out.println(A);
+		// first statement prints the value stored in long
+		System.out.print(abc);
+		// second statement is used to print the value stored in the String
+		System.out.println(xyz);
+		// third statement is used to print value stored in int
+		// NOTE:- JAVA is a case sensitive language so S must be capital in the printing
+		// Statements as well as in String in future you all will get to know that
+		// leaving this where you have to type in caps
+	}
+}
+

DAY1/VARIABLES/variable2.java

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+package DAY1;
+
+public class variable2 {
+	public static void main(String[] args) {
+		int a = 21, b = 21, c = 3, j = 89;
+		// this is how you can declare multiple variables of same type
+		String firstname = "harshil", lastname = "bhardwaj";
+		// same goes with every datatype
+		// now we will be performing some operations on them +,*,/and-
+		// and with the String we will concatinate String and the out put
+		int sum = a + b;
+		// we declared the sum and applied + operations on a and b to give sum its value
+		int mul = c * j;
+		// we declared the sum and applied * operations on c and j to give sum its value
+		int minus = j - a;
+		// we declared the sum and applied - operations on a and j to give sum its value
+		int div = b / c;
+		// we declared the sum and applied / operations on b and c to give sum its value
+		System.out.println("SUM IS: " + sum);
+		System.out.println("PRODUCT IS: " + mul);
+		System.out.println("DIFFERENCE IS: " + minus);
+		System.out.println("QUESTIENT IS: " + div);
+		System.out.println(firstname + " " + lastname);
+		// here we concatenated the out put with + sign so that we can manipulate our
+		// out put statement
+		// our out put will be
+		// SUM IS: 42
+		// PRODUCT IS: 267
+		// DIFFERENCE IS: 68
+		// QUESTIENT IS: 7
+		// harshil bhardwaj
+		// so this is how we concatenate out put statements
+	}
+}
+

DAY1/VARIABLES/variable3.java

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+package DAY1;
+
+public class variable3 {
+	public static void main(String[] args) {
+		// in previous tutorial file we saw that we used int while doing division
+		// but what if the things are not completely divisible
+		// lets see
+		int num1 = 23, num2 = 12;
+		double num3 = 23, num4 = 12;
+		// now instead for first applying and operation then printing the value we will
+		// directly print the values and lets see the difference between int and double
+		System.out.println(num1 / num2);// first statement
+		// now if you see that num1 and num2 are int data types so there result will
+		// also be int so the and they both are not fully divisible the answer should be
+		// 1.something
+		// but this first statement will give us only 1 the roundoff value
+		// output of first statement-> 1
+		System.out.println(num3 / num4);// second statement
+		// now if you see here the second statement gives you the out put in double a
+		// perfect decimal digit
+		// output of second statement -> 1.9166666666666667
+	}
+}
+

README.md

@@ -1 +1,19 @@
-# 30DaysOfJava
+# java-for-dummies
+Keep the track of tutorial files uploaded daywise and learn java
+# Setting up JDK
+https://www.oracle.com/java/technologies/javase-jdk13-downloads.html
+1) visit this site and download the latest version of jdk 
+2) Second go to you system enviorment settings and copy paste the past of your jdk folder till bin there
+3) to check run java command on command promt if it runs you are good to goo
+# Setting up an IDE (ECLIPSE)
+I personally prefer ECPLISE IDE 
+https://www.eclipse.org/downloads/
+1) visit this website and download the ide for free
+2) while downloading choose java devloper option that would be sufficient for beginner level
+3) After downloading go to new and select new project (JAVA)
+4) Create a new java class with a specific pakage name 
+5 ) start coding you are good to go
+# java ?
+Java is a general-purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible.
+# Stable release: Java SE 14 / March 17, 2020; 
+