# Print pyramid pattern in C and Java

Write a C and Java program to print pyramid pattern of stars. This post covers below patterns formed by pyramid

##### Pattern 1: Pyramid

*
*  *  *
*  *  *  *  *
*  *  *  *  *  *  *
*  *  *  *  *  *  *  *  *

We have n rows. Here, 1st row will contain (n-1) spaces followed by 1 star, 2nd row will contain (n-2) spaces followed by 3 stars, 3rd row will contain (n-3) spaces followed by 5 stars, and so on.. We can use nested loops to print this pattern where outer loop represents row number (say i) and inner loop prints the space (n-i times) followed by the star pattern (2*i – 1 times).

## Java

##### Pattern 2: Inverted Pyramid

*  *  *  *  *  *  *  *  *
*  *  *  *  *  *  *
*  *  *  *  *
*  *  *
*

Suppose we have n rows. First row will contain 0 space followed by 2*n-1 stars, 2nd row will contain 1 space followed by 2*n-3 stars, 3rd row will contain 2 spaces followed by 2*n-5 stars and so on.. We can use nested loops to print this pattern where outer loop represents row number (say i) and inner loop prints the space (i-1 times) followed by the star pattern (2*n-(2*i-1) times).

## Java

##### Pattern 3: Hollow Pyramid

*
*     *
*           *
*                 *
*  *  *  *  *  *  *  *  *

The idea remains same as Pattern 1 but here we print ‘*’ only for last row and first & last positions for remaining rows. For all other positions, we print space.

## Java

##### Pattern 4: Hollow Inverted Pyramid

*  *  *  *  *  *  *  *  *
*                 *
*           *
*     *
*

The idea remains the same as Pattern 2 but we print ‘*’ only for last row and first & last cell in each row. All other positions will be filled by spaces.