How do we print,
_ _ _ _1
_ _ _2 1
_ _3 2 1
_ 4 3 2 1
In Java?
Please help, I don't know how to get started
To print the desired pattern in Java, you can use nested loops. Here's an example of how you can achieve this:
```java
public class PrintPattern {
public static void main(String[] args) {
int rows = 4;
for (int i = 1; i <= rows; i++) { // iterate from 1 to number of rows
// Print the leading spaces
for (int j = 1; j <= rows - i; j++) {
System.out.print("_ ");
}
// Print the numbers in descending order
for (int k = i; k >= 1; k--) {
System.out.print(k + " ");
}
System.out.println(); // move to the next line after printing each row
}
}
}
```
In this code, we have three nested loops.
The outer loop (i-loop) iterates from 1 to the number of rows.
The first inner loop (j-loop) prints the leading spaces. It calculates the number of leading spaces for each row by subtracting the current row number from the total number of rows. For example, in the first row, there are 4 (rows) - 1 (current row) = 3 leading spaces.
The second inner loop (k-loop) prints the numbers in descending order. It starts from the current row number (i) and decrements by 1 for each iteration.
Finally, we use `System.out.println()` to move to the next line after printing each row.
When you run this code, it will display the desired pattern:
```
_ _ _ _ 1
_ _ _ 2 1
_ _ 3 2 1
_ 4 3 2 1
```
I hope this helps you get started! Let me know if you have any further questions.