Question

How to implement the power function in TypeScript

Answer 1

function pow(base: number, exponent: number): number {
    let result: number = 1;
     
    while (exponent) {
        if (exponent & 1) {
            result *= base;
        }
        exponent >>= 1;
        base *= base;
    }
    
    return result;
}
 
 
console.log(pow(2, 3));  // 8
console.log(pow(3, 3));  // 27
console.log(pow(3, 2));  // 9
console.log(pow(2, 2));  // 4
console.log(pow(5, 2));  // 25
console.log(pow(-2, 4)); // 16


 
/*
run:
 
8 
27 
9 
4 
25 
16 
 
*/

 

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