Program to print all two-digit numbers in descending order

Write a program to print all the two-digit numbers in descending order, that is print all the two-digit numbers from largest to smallest.

Output format:

99 98 97 96 95 94 93 ..... 13 12 11 10

Approach:

We know that the largest two-digit number is 99 and the smallest two-digit number is 10. So, we can start from 99 and then keep on decreasing the number and print till we reach 10.

Step-by-step algorithm:

• Declare a for loop which start from 99 and keep on decreasing the number by 1 till we reach 10.
• For each iteration, print the number.
• After all the iterations, we will have all the two-digit numbers printed in decreasing order.

Below is the implementation of the above approach:

99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33...

Time Complexity: O(1)
Auxiliary Space: O(1)