Question

How to get the fraction and exponent of a real number in TypeScript

Answer 1

function frexp(value: number): number[] {
  if (value === 0) return [0, 0];

  const exponent: number = Math.floor(Math.log2(Math.abs(value))) + 1;
  const fraction: number = value / Math.pow(2, exponent);

  return [fraction, exponent];
}

const d: number = 3.14;
const [fraction, exponent] = frexp(d);

console.log(`fraction = ${fraction.toFixed(3)} exponent = ${exponent}`);

  
  
  
/*
run:
  
 "fraction = 0.785 exponent = 2" 
  
*/

 

70+ SQL courses for beginners and professionals