java ke programs aate hai kisi ko
Answers
/* PATTERN QUESTIONS IN JAVA
* The pattern consists of 9 rows, with an increasing and decreasing size combination.
* We develop a general logic, apply it for an increasing sequence for first 5 rows
* Then we apply the same logic for the next decreasing 4 rows
*
* Here is a program which prints the pattern
* Explanations are given as comments
* Screenshots also attached
*
*/
public class P26_EpicPattern
{
public static void main(String[] args)
{
for(int i=0;i<5;i++)
{
int ch=97; //97 is the ASCII value for 'a'
int nc=2*i+1; //Number of characters which will go in a line
boolean isReverse=false; //Boolean value to see if we want to print letters in reverse
for(int spc=0;spc<5-i;spc++) //Loop for spaces. We need 5-i spaces
{
System.out.print(" ");
}
if(i%2!=0) //isReverse is set to True in alternate lines
{
isReverse=true;
}
if(isReverse) //Condition of printing letters in reverse
{
ch+=nc; //nc added to ch to get the character to start the reverse series line
for(int k=0;k<nc;k++)
{
System.out.print((char)(ch-1)); //(ch-1) is typecasted to char and printed
ch--; //Decrementing the ASCII Value to print the next character in reverse series
}
}
else //Condition of printing letters in a normal series
{
for(int k=0;k<nc;k++)
{
System.out.print((char)ch); //ch simply typecasted to char and printed
ch++; //Incrementing value of ch to print next character in series
}
}
System.out.println(); //New Line statement
}
for(int i=3;i>=0;i--) //Starting the decreasing triangle size loop. All inner contents are the same
{
int ch=97;
int nc=2*i+1;
boolean isReverse=false;
for(int spc=0;spc<5-i;spc++)
{
System.out.print(" ");
}
if(i%2!=0)
{
isReverse=true;
}
if(isReverse)
{
ch+=nc;
for(int k=0;k<nc;k++)
{
System.out.print((char)(ch-1));
ch--;
}
}
else
{
for(int k=0;k<nc;k++)
{
System.out.print((char)ch);
ch++;
}
}
System.out.println();
}
}
}
