'JavaScript seems to be doing floating point wrong (compared to C)

From everything I've been able to find online, JavaScript allegedly uses IEEE 754 doubles for its numbers, but I have found numbers that can work in C doubles, but not in JavaScript. For example,

#include <stdio.h>

int main(){
    double x = 131621703842267136.;
    printf("%lf\n", x);
}

prints 131621703842267136.000000 NOTE: IN AN EARLIER VERSION OF THE QUESTION I COPPIED THE WRONG NUMBER FOR C, but in JavaScript

console.log(131621703842267136)

outputs 131621703842267140. From everything I've read online, both C doubles and JavaScript numbers are 64-bit floating point, so I am very confused why they would output different results. Any ideas?

javascript c floating-point floating-accuracy

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source

'JavaScript seems to be doing floating point wrong (compared to C)

Sources

Related Questions