almost-equal

import almostEqual from 'almost-equal'; // Define the numbers to compare. 'b' is slightly different from 'a', // representing a common floating-point precision scenario. const a = 100; const b = 100 + 1e-12; console.log('--- Comparing with explicit FLT_EPSILON ---'); console.log(`a = ${a}, b = ${b}`); // Check if 'a' and 'b' are almost equal using single-precision (32-bit) float epsilon. // This uses a relatively small tolerance. console.log(`Are a and b almost equal (FLT_EPSILON)? ${almostEqual(a, b, almostEqual.FLT_EPSILON, almostEqual.FLT_EPSILON)}`); console.log('\n--- Comparing with explicit DBL_EPSILON ---'); console.log(`a = ${a}, b = ${b}`); // Check if 'a' and 'b' are almost equal using double-precision (64-bit) float epsilon. // This typically provides a larger, more forgiving tolerance. console.log(`Are a and b almost equal (DBL_EPSILON)? ${almostEqual(a, b, almostEqual.DBL_EPSILON, almostEqual.DBL_EPSILON)}`); console.log('\n--- Demonstrating with default tolerance (DBL_EPSILON) ---'); // A classic floating-point addition error: 0.1 + 0.2 is not exactly 0.3 const c = 0.1 + 0.2; // Result is typically 0.30000000000000004 const d = 0.3; console.log(`c = ${c}, d = ${d}`); // Using 'almostEqual' with its default tolerance (DBL_EPSILON) should correctly identify them as 'almost equal'. console.log(`Are c and d almost equal (default DBL_EPSILON)? ${almostEqual(c, d)}`);