In this tutorial, we will discuss the concept of C program to reverse triangle number patterns using while loop
In C language, we can use for loop, while loop, do-while loop to display various number, star, alphabet and binary number patterns
In this topic, we demonstrate how to display some reversed number patterns using the nested while loop in C language.
Pattern 1
#include <stdio.h> #include <stdlib.h> int main() { int j,rows;//variable declaration printf("Enter the number of rows:\n "); scanf("%d",&rows);//take input from user printf("\n"); while(rows>=1){//outer while loop int j=rows; while(j>=1){//inner while loop printf("%d",j);//Display pattern j--; } rows--; printf("\n");//move to next line } getch(); return 0; }
When the above code is executed, it produces the following results
Enter the number of rows: 8 87654321 7654321 654321 54321 4321 321 21 1
Pattern 2
#include <stdio.h> #include <stdlib.h> int main() { int j,rows;//variable declaration printf("Enter the number of rows: "); scanf("%d",&rows); printf("\n"); int i; while(rows>=0){ for(i=1; i<=rows; i++){ printf("%d",rows); } rows--; printf("\n"); } getch(); return 0; }
When the above code is executed, it produces the following results
Enter the number of rows: 8 88888888 7777777 666666 55555 4444 333 22 1
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