goLogic errorEasy

Float comparison without epsilon delta tolerance

Time: 0:00

BugFind the bug and fix the code

What it should do

Check if 0.1 + 0.2 equals 0.3 within precision. Example: compareFloatSum(0.1, 0.2, 0.3) -> true

What happens instead

0.1 + 0.2 == 0.3 evaluates to false due to IEEE 754 precision

package main

import "fmt"

func compareFloatSum(a, b, expected float64) bool {
	// Direct floating point equality check
	return (a + b) == expected
}

func main() {
	fmt.Println(compareFloatSum(0.1, 0.2, 0.3))
}

Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).

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This bug belongs to the logic errors pattern

The wrong operator, an inverted condition, a formula the right way round but backwards.

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package main import "fmt" func compareFloatSum(a, b, expected float64) bool { // Direct floating point equality check return (a + b) == expected } func main() { fmt.Println(compareFloatSum(0.1, 0.2, 0.3)) }

Float comparison without epsilon delta tolerance

What it should do

What happens instead

More logic errors to practise

Float comparison without epsilon delta tolerance

What it should do

What happens instead

More logic errors to practise