g(n), g is a function where n is input.
This function will count iterated numbers from 0 ~ n where digit 7 is included
For example, G(20), the analysis is as the following:
- let count = 0
- iterate from 0 ~ 20
- 0
- 1
- 2
- 3
- 4
- 5
- 6
- 7, digit 7 is included, count++
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17, digit 7 is included, count++
- 18
- 19
- 20
So, pseudo code will be as the following
function(g) {
let count = 0;
for(let i = 0;i < g; i++)
{
if (i.includes('7') count++;
}
}