float starting from 1.0 to 2.0 increase of 0.1

Asked May 22 '20 at 11:38

Active May 22 '20 at 11:38

Viewed 32 times

#include <iostream>
#include <stdio.h>
#include <math.h>


int  main()
{
setlocale(LC_ALL,"Turkish");
for (float i=1.0; i<=2.0f; i+=0.1)  //to float 2.0 but result is to 1.9
printf("%.1f\n" ,i);
}

// I start from float 1.0 to 2.0 increase by 0.1 but I will finish at 2.0 instead of 1.9 // Why doesn't it end at 2.0Why doesn't it end at 2.0

/*
//RESULT
1,0
1,1
1,2
1,3
1,4
1,5
1,6
1,7
1,8
1,9     
*/

asked May 22 '20 at 11:38

Habib ALPASLANOĞULLARI

Try printing the numbers with more precision: https://gcc.godbolt.org/z/-uYQ8a – HolyBlackCat May 22 '20 at 11:39
2

to get desired output use integer loop variable (never float!) `for (int i=0;i<=10;++i) cout << 1.0 + 0.1*i;` – 463035818_is_not_an_ai May 22 '20 at 11:42
It does not end with 2.0, it also ends with 1.9 – Habib ALPASLANOĞULLARI May 22 '20 at 11:44
Read the linked thread! – HolyBlackCat May 22 '20 at 11:46
2

Yes, but do you see why? There are extra numbers after decimal point due to floating point inaccuracies, and adding `0.1` to `1.9000002` makes it bigger than `2.0`. – Yksisarvinen May 22 '20 at 11:47
I understand the problem thanks – Habib ALPASLANOĞULLARI May 22 '20 at 11:54

float starting from 1.0 to 2.0 increase of 0.1

0 Answers0