java program 22 print diamond shape star pattern in java

sure! in this tutorial, we'll create a java program that prints a diamond shape star pattern. this is a common exercise that helps you understand loops and nested structures in java.

overview of diamond shape star pattern

a diamond shape star pattern consists of two parts:
1. the upper part (triangle) of the diamond.
2. the lower part (inverted triangle) of the diamond.

for example, given an input of `n = 5`, the output will look like this:

steps to create the diamond pattern

1. **determine the height of the diamond**: the height can be specified as an odd number to make the pattern symmetrical.
2. **print the upper part of the diamond**: use nested loops to print spaces and stars.
3. **print the lower part of the diamond**: similar to the upper part but in reverse order.

java code example

here's a complete java program that prints a diamond shape star pattern:

breakdown of the code

1. **input handling**: we use a `scanner` to get the height of the diamond from the user. we also validate that the number is odd.
2. **upper part of the diamond**:
- we use an outer loop that runs with a step of 2 to print the odd rows (1, 3, 5,...).
- for each row, we first print the required leading spaces and then the stars.
- the number of stars increases by 2 for each subsequent row, while the number of leading spaces decreases.
3. **lower part of the diamond**:
- similar to the upper part, but we start from `n - 2` and decrease by 2 each time.
- the number of leading spaces increases as we go down.
4. **output**: the program prints the diamond shape based on the user's input.

running the program

to run this program:
3. run the compiled program using `java diamondpattern`.

you will be prompted to enter the height of the diamond, and the program will display the diamond pattern accordingly.

conclusion

this exercise demonstrates ho ...

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