### Algorithm:

**STEP 1:**START**STEP 2:**SET i=1,j=1,k=1,l=1,direction=1**STEP 3:**SET matrix[10][10]**STEP 4:**REPEAT STEP 5 to 9 UNTIL i is less than 10**STEP 5:**SET j=0**STEP 6:**REPEAT STEP 7 and 8 UNTIL j is less than 10**STEP 7:**SET matrix[i][j]=0**STEP 8:**SET j=j+1**STEP 9:**SET i=i+1 // steps for printing the matrix**STEP 10:**SET i=0**STEP 11:**REPEAT STEP 12 to 16 UNTIL i is less than 10**STEP 12:**SET j=0**STEP 13:**REPEAT STEP 14 and 15 UNTIL j is less than 10**STEP 14:**PRINT matrix[i][j]**STEP 15:**SET j=j+1**STEP 16:**SET i=i+1 //steps for snake**STEP 17:**SET i=1**STEP 18:**SET j=0**STEP 19:**SET k=0**STEP 20:**REPEAT STEP 21 to 26 UNTIL i is less than 100**STEP 21:**SET matrix[j][k]=i**STEP 22:**IF direction=1 IF k+1<10 IF matrix[j][k+1]==0 SET k=k+1 ELSE SET j=j+1 and SET direction =2 ELSE SET j= j+1 and SET direction =2**STEP 23:**IF direction=2 IF j+1<10 IF matrix[j+1][k]==0 SET j=j+1 ELSE SET k=k-1 and SET direction =3 ELSE SET k= -1 and SET direction =3**STEP 24:**IF direction=3 IF k-1>=0 IF matrix[j][k-1]==0 SET k=k-1 ELSE SET j=j-1 and SET direction =4 ELSE SET j= j-1 and SET direction =4**STEP 25:**IF direction=4 IF j-1>=0 IF matrix[j-1][k]==0 SET j=j-1 ELSE SET k=k+1 and SET direction =1 ELSE SET k= k+1 and SET direction =1**STEP 26:**SET i=i+1 // Steps for printing the matrix**STEP 27:**SET i=0**STEP 28:**REPEAT STEP 29 to 33 UNTIL i is less than 10**STEP 29:**SET j=0**STEP 30:**REPEAT STEP 31 and 32 UNTIL j is less than 10**STEP 31:**PRINT matrix[i][j]**STEP 32:**SET j=j+1**STEP 33:**SET i=i+1**STEP 34:**END

### Program:

**public class** pattern
{
**public static void** main(String[] args) {
**int** lines=4;
**int** i,j,k,l;
**int** space=0;
**for**(i=0;i<lines;i++){// this loop is used to print lines
**for**(j=1;j<=space;j++){// this loop is used to print space in a line
System.out.print(" ");
}
**for**(j=1;j<=lines;j++){// this loop is used to print numbers in a line
**if**(j<=(lines-i))
System.out.print(j);
**else**
System.out.print("*");
}
j--;
**while**(j>0){// this loop is used to print numbers in a line
**if**(j>lines-i)
System.out.print("*");
**else**
System.out.print(j);
j--;
}
**if**((lines-i)>9)// this loop is used to increment space
space=space+1;
System.out.println("");
}
}

**Output:**

__Source__**: Javapoint**

**The Tech Platform**

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