Program to print first 10 even numbers

Program to print first 10 even numbers. A number is even if it is divisible by 2 for example 4, 100, 24 etc.

0 2 4 6 8 10 12 14 16 18

Approach: Checking Parity using Modulo operator(%)

Using the modulo % operator we can find the remainder of any number when divided by 2, giving us the parity according to two cases:

• remainder = 0: Even number
• remainder = 1: Odd number

While we do not get first 10 even numbers, we can use the above method to check the parity and print the even numbers.

Step-by-step algorithm:

• Create a function first10Even() which prints the first 10 even numbers.
• Keep count of total even numbers printed using a variable cnt initialized to 0.
• Until cnt reaches 10, iterate on whole numbers:
  • if a whole number is even print that whole number and increment cnt by 1.

First 10 even numbers are:
0 2 4 6 8 10 12 14 16 18 

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