C program to reverse triangle number patterns using while loop
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
Reverse triangle number 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
Reverse triangle number 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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