public class CourseDetails {
public static void main(String[] args) {
int a = 10;
if (a % 2 == 0) {
System.out.println("Given number is even");
} else {
System.out.println("Given number is odd");
}
}
}
public class CourseDetails {
public static void main(String[] args) {
for (int i = 1; i <= 100; i++) {
if (i % 2 == 1) {
System.out.println("odd" + i);
}
}
}
}
public class CourseDetails {
public static void main(String[] args) {
int count = 0;
for (int i = 1; i <= 100; i++) {
if (i % 2 == 1) {
count = count + 1;
}
}
System.out.println("Number of odd numbers present inbetween 1 to 100:"+count);
}
}
public class CourseDetails {
public static void main(String[] args) {
for (int i = 1; i <= 100; i++) {
if (i % 2 == 0) {
System.out.println("even" + i);
}
}
}
}
public class CourseDetails {
public static void main(String[] args) {
int count = 0;
for (int i = 1; i <= 100; i++) {
if (i % 2 == 0) {
count = count + 1;
}
}
System.out.println("Number of even numbers present inbetween 1 to 100:"+count);
}
}
public class CourseDetails {
public static void main(String[] args) {
int num = 12345;
int res = 0;
int rem = 0;
while (num > 0) {
rem = num % 10;
res = (res * 10) + rem;
num = num / 10;
}
System.out.println("Reverse of a number: " + res);
}
}
public class CourseDetails {
public static void main(String[] args) {
int num = 121;
int n=num;
int res = 0;
int rem = 0;
while (num > 0) {
rem = num % 10;
res = (res * 10) + rem;
num = num / 10;
}
if (n==res) {
System.out.println("Given number is palindrome");
} else {
System.out.println("Given number is not a palindrome");
}
}
}
%10------to get the last digit from a number
*10------to increase a digit in a number
/10---------to remove the last digit from a number
public class CourseDetails {
public static void main(String[] args) {
int num = 153;
int n = num;
int res = 0;
int rem = 0;
while (num > 0) {
rem = num % 10;
res = res + (rem * rem * rem);
num = num / 10;
}
if (n == res) {
System.out.println("Armstrong number");
} else {
System.out.println("Not an Armstrong number");
}
}
}
public class CourseDetails {
public static void main(String[] args) {
int num = 153;
int res = 0;
int rem = 0;
while (num > 0) {
rem = num % 10;
res = res + rem;
num = num / 10;
}
System.out.println("Sum of digits: "+res);
}
}
public class CourseDetails {
public static void main(String[] args) {
int num = 153;
int res = 1;
int rem = 0;
while (num > 0) {
rem = num % 10;
res = res * rem;
num = num / 10;
}
System.out.println("Product of digits: "+res);
}
}
public class CourseDetails {
public static void main(String[] args) {
int num = 15345;
int count = 0;
while (num > 0) {
count++;
num = num / 10;
}
System.out.println("Count of digits: " + count);
}
}
public class CourseDetails {
public static void main(String[] args) {
int n = 10;
int fact = 1;
for (int i = 1; i <= n; i++) {
fact = fact * i;
}
System.out.println("Factorial: " + fact);
}
}
public class CourseDetails {
public static void main(String[] args) {
int a = 0;
int b = 1;
System.out.println(a);
System.out.println(b);
for (int i = 1; i <= 10; i++) {
int c = a + b;
System.out.println(c);
a = b;
b = c;
}
}
}
public class A {
public static void main(String[] args) throws IOException {
String s = "Welcome to java class";
String res = "";
for (int i = s.length() - 1; i >= 0; i--) {
char c = s.charAt(i);
res = res + c;
}
System.out.println("Reverse of string: " + res);
}
}
public class A {
public static void main(String[] args) throws IOException {
String s = "Welcome to java class";
String res = "";
for (int i = s.length() - 1; i >= 0; i--) {
char c = s.charAt(i);
res = res + c;
}
System.out.println("Reverse of string: " + res);
if (s.equals(res)) {
System.out.println("String is paindrome");
} else {
System.out.println("Not palindrome");
}
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "Welcome to java class";
String res = "";
String[] sp = str.split(" ");
for (String s : sp) {
System.out.println();
String rev = "";
for (int i = s.length() - 1; i >= 0; i--) {
char c = s.charAt(i);
rev = rev + c;
}
res = res + rev + " ";
}
System.out.println(res);
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "welcome to java class";
String[] sp = str.split(" ");
String res = "";
for (String s : sp) {
char c = s.charAt(0);
String sub = s.substring(1);
res = res + Character.toUpperCase(c) + sub + " ";
}
System.out.println(res);
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "raining here...";
String res = "";
LinkedHashSet<Character> l = new LinkedHashSet<>();
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
l.add(c);
}
for (Character c : l) {
res = res + c;
}
System.out.println(res);
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "java sql java python java python";
String res = "";
LinkedHashSet<String> l = new LinkedHashSet<>();
String[] sp = str.split(" ");
for (String s : sp) {
l.add(s);
}
for (String x : l) {
res = res + x+" ";
}
System.out.println(res);
}
}
public class A {
public static void main(String[] args) throws IOException {
int[] a = { 55, 39, 26, 78, 55, 99, 30 };
TreeSet<Integer> t = new TreeSet<>();
for (int i = 0; i < a.length; i++) {
t.add(a[i]);
}
System.out.println(t);
}
}
public class CourseDetails {
public static void main(String[] args) {
int[] a = { 55, 20, 60, 90, 15, 35 };
System.out.println("Before sorting");
for (int i : a) {
System.out.println(i);
}
for (int i = 0; i < a.length; i++) {
for (int j = i + 1; j < a.length; j++) {
// Ascending order
if (a[i] > a[j]) {
int temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
System.out.println("After sorting in ascending order");
for (int i : a) {
System.out.println(i);
}
}
}
public class CourseDetails {
public static void main(String[] args) {
int[] a = { 55, 20, 60, 90, 15, 35 };
System.out.println("Before sorting");
for (int i : a) {
System.out.println(i);
}
for (int i = 0; i < a.length; i++) {
for (int j = i + 1; j < a.length; j++) {
// Descending order
if (a[i] < a[j]) {
int temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
System.out.println("After sorting in descending order");
for (int i : a) {
System.out.println(i);
}
}
}
public class CourseDetails {
public static void main(String[] args) {
String s = "raining here...";
char[] c = s.toCharArray();
LinkedHashMap<Character, Integer> mp = new LinkedHashMap<>();
for (char d : c) {
if (mp.containsKey(d)) {
Integer i = mp.get(d);
mp.put(d, i + 1);
}
else {
mp.put(d, 1);
}
}
System.out.println(mp);
}
}
public class A {
public static void main(String[] args) throws IOException {
int[] a= {10,20,30,40,50};
try {
for (int i = 0; i < a.length; i=i+2) {
System.out.println(a[i]+a[i+1]);
}
}
catch (Exception e) {
System.out.println(a[a.length-1]);
}
}
}
public class A {
public static void main(String[] args) throws IOException {
String s = "java sql java python ";
String[] sp = s.split(" ");
LinkedHashMap<String, Integer> mp = new LinkedHashMap<>();
for (String st : sp) {
if (mp.containsKey(st)) {
Integer i = mp.get(st);
mp.put(st, i + 1);
} else {
mp.put(st, 1);
}
}
System.out.println(mp);
}
}
public class A {
public static void main(String[] args) throws IOException {
String s = "raining here...";
LinkedHashMap<Character, Integer> mp = new LinkedHashMap<>();
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (mp.containsKey(c)) {
Integer in = mp.get(c);
mp.put(c, in + 1);
} else {
mp.put(c, 1);
}
}
System.out.println(mp);
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "All the best";
String s = str.replace(" ", "");
String vow = "";
int v = 0;
String con = "";
int co = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'A' || c == 'E' || c == 'I' || c == 'O'
|| c == 'U') {
vow = vow + c;
v++;
} else {
con = con + c;
co++;
}
}
System.out.println("Vowels: " + vow);
System.out.println("vowels count " + v);
System.out.println("Consonants: " + con);
System.out.println("Consonants count " + co);
}
}
ASCII Values:
---------------------
65-90-------------upper case alphabets
97-122------------lower case alphabets
48-57-------------digits
special charcter
public class A {
public static void main(String[] args) throws IOException {
String str = "RenuDev1235@gmail.com";
String s = str.replace(" ", "");
String cap = "";
int ca = 0;
String small = "";
int sm = 0;
String digit = "";
int di = 0;
String spec = "";
int sp = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
int x = c;
if (x >= 65 && x <= 90) {
// capital letter
cap = cap + c;
ca++;
} else if (x >= 97 && x <= 122) {
// Small letter
small = small + c;
sm++;
} else if (x >= 48 && x <= 57) {
// digit
digit = digit + c;
di++;
} else {
// Special character
spec = spec + c;
sp++;
}
}
System.out.println("Small letters: " + small);
System.out.println("Small letters count " + sm);
System.out.println("Capital letters: " + cap);
System.out.println("Capital letters count: " + ca);
System.out.println("Digits: " + digit);
System.out.println("Digits count: " + di);
System.out.println("Special characters : " + spec);
System.out.println("Special characters count: " + sp);
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "RenuDev1235@gmail.com";
String s = str.replace(" ", "");
String cap = "";
int ca = 0;
String small = "";
int sm = 0;
String digit = "";
int di = 0;
String spec = "";
int sp = 0;
for (int i = 0; i < s.length(); i++) {
char x = s.charAt(i);
if (x >='A' && x <= 'Z') {
// capital letter
cap = cap + x;
ca++;
} else if (x >= 'a' && x <= 'z') {
// Small letter
small = small + x;
sm++;
} else if (x >='0' && x <= '9') {
// digit
digit = digit + x;
di++;
} else {
// Special character
spec = spec + x;
sp++;
}
}
System.out.println("Small letters: " + small);
System.out.println("Small letters count " + sm);
System.out.println("Capital letters: " + cap);
System.out.println("Capital letters count: " + ca);
System.out.println("Digits: " + digit);
System.out.println("Digits count: " + di);
System.out.println("Special characters : " + spec);
System.out.println("Special characters count: " + sp);
}
}
public class A {
public static void main(String[] args) throws IOException {
String str = "RenuDev1235@gmail.com";
String s = str.replace(" ", "");
String cap = "";
int ca = 0;
String small = "";
int sm = 0;
String digit = "";
int di = 0;
String spec = "";
int sp = 0;
for (int i = 0; i < s.length(); i++) {
char x = s.charAt(i);
if (Character.isUpperCase(x)) {
// capital letter
cap = cap + x;
ca++;
} else if (Character.isLowerCase(x)) {
// Small letter
small = small + x;
sm++;
} else if (Character.isDigit(x)) {
// digit
digit = digit + x;
di++;
} else {
// Special character
spec = spec + x;
sp++;
}
}
System.out.println("Small letters: " + small);
System.out.println("Small letters count " + sm);
System.out.println("Capital letters: " + cap);
System.out.println("Capital letters count: " + ca);
System.out.println("Digits: " + digit);
System.out.println("Digits count: " + di);
System.out.println("Special characters : " + spec);
System.out.println("Special characters count: " + sp);
}
}
public class A {
public static void main(String[] args) {
String s = "goodday";
char[] a = s.toCharArray();
System.out.println("Before sorting");
for (int i = 0; i < a.length; i++) {
System.out.print(a[i]);
}
for (int i = 0; i < a.length; i++) {
for (int j = i + 1; j < a.length; j++) {
if (a[i] > a[j]) {
char temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
System.out.println();
System.out.println("After sorting in descending order");
for (int i = 0; i < a.length; i++) {
System.out.print(a[i]);
}
}
}
public class A {
public static void main(String[] args) {
String s1 = "adbc";
String s2 = "dbca";
if (s1.length() == s2.length()) {
// To convert String into Character array
char[] c1 = s1.toCharArray();
char[] c2 = s2.toCharArray();
// Arrays--utility class,u can use those predefined mwthods in Array variable
Arrays.sort(c1);
Arrays.sort(c2);
// ValueOf meThod here it is converting char array into String
String a = String.valueOf(c1);
String b = String.valueOf(c2);
if (a.equals(b)) {
System.out.println("Anagram");
} else {
System.out.println("Not anagram-Exactly characters are not matching");
}
}
else {
System.out.println("Not Anagram-Length not equal");
}
}
}
public class A {
public static void main(String[] args) {
String s1 = "adbc";
String s2 = "dbca";
if (s1.length() == s2.length()) {
// To convert String into Character array
char[] c1 = s1.toCharArray();
char[] c2 = s2.toCharArray();
// Arrays--utility class,u can use those predefined methods in Array variable
Arrays.sort(c1);
Arrays.sort(c2);
boolean x = Arrays.equals(c1, c2);
if (x==true) {
System.out.println("Anagram");
} else {
System.out.println("Not anagram-Exactly characters are not matching");
}
}
else {
System.out.println("Not Anagram-Length not equal");
}
}
}
public class A {
public static void main(String[] args) {
int flag = 0;
int n = 1;
if (n == 0 || n == 1) {
System.out.println("0 and 1 not considered as prime number");
} else {
for (int i = 2; i <= n / 2; i++) {
if (n % i == 0) {
flag = 1;
}
}
if (flag == 0) {
System.out.println("Given number is prime");
} else {
System.out.println("Not prime");
}
}
}
}
*
* *
* * *
public class A {
public static void main(String[] args) {
for (int i = 1; i <= 3; i++) {
for (int j = 0; j < i; j++) {
System.out.print("* ");
}
System.out.println();
}
}
}
1
2 2
3 3 3
public class A {
public static void main(String[] args) {
for (int i = 1; i <= 3; i++) {
for (int j = 0; j < i; j++) {
System.out.print(i+" ");
}
System.out.println();
}
}
}
1
1 2
1 2 3
public class A {
public static void main(String[] args) {
for (int i = 1; i <= 3; i++) {
for (int j = 0; j < i; j++) {
System.out.print(j+" ");
}
System.out.println();
}
}
}
*
* *
* * *
public class A {
public static void main(String[] args) {
for (int i = 1; i <= 3; i++) {
for (int k = 3 - i; k > 0; k--) {
System.out.print(" ");
}
for (int j = 0; j < i; j++) {
System.out.print("* ");
}
System.out.println();
}
}
}
*
**
***
public class A {
public static void main(String[] args) {
for (int i = 1; i <= 3; i++) {
for (int k = 3 - i; k > 0; k--) {
System.out.print(" ");
}
for (int j = 0; j < i; j++) {
System.out.print("*");
}
System.out.println();
}
}
}
