Example: Left Arrow Pattern and Right Arrow Pattern in C language

// Left Arrow Pattern and Right Arrow Pattern in C language
#include <stdio.h>

int main() {
    int r, r1, c, rows, row1;

    printf("-----Enter the number of rows to print the left & right arrows pattern-----\n");
    scanf("%d", &rows);

    row1 = rows;
    rows = rows * 4;

    printf("\n----Ths is the left arrow pattern-----\n\n");
    for (r = 1; r < rows; r++) {
    	// to print the left arrow
    	if (r <= row1) {
    		for (c = 1; c <= (row1 - r); c++)
	    		printf(" ");
	        for (c = r;c <= row1; c++)
	        	printf("*");
	        printf("\n");
    	}
    	if (r > row1 && r <= row1 * 2) {
    		for (c = 1; c <= (r - row1); c++)
    			printf(" ");
      		for (c = 1; c <= (r - (row1 - 1)); c++) {
      			if ((r - row1) < row1)
      				printf("*");
      		}
      		printf("\n");
    	}

    	// to print the right arrow
    	if (r > row1 * 2 && r <= row1 * 3) {
    		if (r == (row1 * 2) + 1)
    			printf("\n----Ths is the right arrow pattern-----\n\n");
    		for (c = (r - 1) - (row1 * 2); c >= 1; c--)
	    		printf("  ");
	        for (c = (3 * row1) - (r - 1); c >= 1; c--)
	        	printf("*");
	        printf("\n");
    	}
    	if (r > row1 * 3) {
    		for (c = (row1 * 4) - (r + 1); c >= 1; c--)
	    		printf("  ");
	        for (c = (r + 1) - (3 * row1); c >= 1; c--)
	        	printf("*");
	        printf("\n");
    	}
    }
    return 0;
}