Question

How to multiply two numbers recursively without using multiplication, division, bitwise and loops in TypeScript

Answer 1

function multiply(x: number, y: number) : number{
    if (y > 0)
        return (x + multiply(x, y - 1));
  
    if (y < 0)
        return -multiply(x, -y);
  
    return 0;
}

console.log("5 * 7 = " + multiply(4, 7));
console.log("3 * 0 = " + multiply(3, 0));
console.log("0 * 3 = " + multiply(0, 3));
console.log("3 * -5 = " + multiply(3, -5));
console.log("-3 * 6 = " + multiply(-3, 6));

 
 
 
/*
run:
 
"5 * 7 = 28" 
"3 * 0 = 0" 
"0 * 3 = 0" 
"3 * -5 = -15" 
"-3 * 6 = -18" 
 
*/

 

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