Question: How Do You Tell If A Number Is A Power Of Another Number?

How do you check if a number is a power of another number C++?

To check if a given integer x is a power of a given integer y , check if x > 0 && Y % x == 0 : Y is the largest power of y that can fit into an integer datatype.

The general idea is that if A is some power of Y , A can be expressed as B/Ya , where a is some integer and A < B ..

How do you know if a number is a power of 10?

Number is a power of 10 if it’s equal to 10, 100, 1000 etc. 1 is also 0-th power of 10. Other numbers like 2, 3, 11, 12 etc. are not powers of 10.

How do you find if a number is power of 3?

Suppose we have a number n. We have to check whether the number is the power of 3 or not. So if the number is like n = 27, that is the power of 3, the result will be true, if n = 15, it will be false.

How do you find if a number is a power of 2?

If log2(n) is integer than n is a power of 2, else not. Keep dividing the number by two, i.e, do n = n/2 iteratively until n becomes 1. In any iteration, if n%2 becomes non-zero and n is not 1 then n is not a power of 2. If n becomes 1 then it is a power of 2.

How do you find if a number is a power of 4?

1. A simple method is to take a log of the given number on base 4, and if we get an integer then the number is the power of 4. 2. Another solution is to keep dividing the number by 4, i.e, do n = n/4 iteratively.

How do you find the power of a number?

The power of a number has a special name: exponent. So we show the power of a number by using an exponent, and when we show a number with an exponent, we say that the number is raised to a power – the power of the exponent! This exponent tells us how many times we are going to multiply the base number by itself.

Is function a power python?

Python pow() Function The pow() function returns the value of x to the power of y (xy). If a third parameter is present, it returns x to the power of y, modulus z.

How do you determine if a number is a power of another number?

Algorithm to solve this problem: Find the log of a base b and assign its integer part to variable s. Also, find the b to the power s and assign it to another variable p. Check if p is equal to a then a is a power of another number b and print a is the power of another number b.

How do you check if a number is a perfect power?

The trick to determining if a number is a perfect power is to know that, if the number is a perfect power, then the exponent e must be less than log2 n, because if e is greater then 2^e will be greater than n.

How do you check if a number is a power of 5?

How to check if number is summation of powers of 5 [closed]First check if last digit is 5.If last digit is 5; divide it by 5. If result of division is 1, then number is power of 5. Else check if division result itself is power of 5 (i.e. go to step 1 with result as number).

How do you check if a number is a power of another number using recursion in Python?

Python Program to Find the Power of a Number Using RecursionTake the base and exponential value from the user.Pass the numbers as arguments to a recursive function to find the power of the number.Give the base condition that if the exponential power is equal to 1, return the base number.More items…