How do you check if an integer is a power of 3?

How do you check if an integer is a power of 3?

if (log n) / (log 3) is integral then n is a power of 3….

1. for 64-bit integers you shouldn’t get more than 64 cases.
2. You could expand out the constants: e.g. n = 3 * 3 or n = 3 ** 2.

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

The solution in Java code log(n) divided by Math. log(3) we can get a double back which when rounded using Math. round will result in a 3 being returned if the input number is a power of 3. We can then compare the power of that to the input value to return a resultant boolean .

How do you find out 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 a number to the power of 3?

The number ​X​ to the power of 3 is called ​X​ cubed. ​X​ is called the base number. Calculating an exponent is as simple as multiplying the base number by itself. By definition, number to the power of 0 will always equal 1.

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

C Program to find whether a no is power of two

1. A simple method for this is to simply take the log of the number on base 2 and if you get an integer then number is power of 2.
2. Another solution is to keep dividing the number by two, i.e, do n = n/2 iteratively.
3. All power of two numbers have only one bit set.

What is the power of 3 in math?

In mathematics, a power of three is a number of the form 3n where n is an integer – that is, the result of exponentiation with number three as the base and integer n as the exponent.

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

1) Initialize pow = x, i = 1 2) while (pow < y) { pow = pow*pow i *= 2 } 3) If pow == y return true; 4) Else construct an array of powers from x^i to x^(i/2) 5) Binary Search for y in array constructed in step 4. If not found, return false. Else return true.

How do you find the power value of a number?

A number, ​X​, to the power of 2 is also referred to as ​X​ squared. The number ​X​ to the power of 3 is called ​X​ cubed. ​X​ is called the base number. Calculating an exponent is as simple as multiplying the base number by itself.

How do you do 10 to the 3rd power?

To find 10 to the 3rd power, you do repeated multiplication. The third power tells you that you’re going to multiply 10 x 10 x 10.

What is function argument and return in C?

C function argument and return values. A function in C can be called either with arguments or without arguments. These function may or may not return values to the calling functions. All C functions can be called either with arguments or without arguments in a C program. Also, they may or may not return any values.

What is the function prototype of a function in C?

All C functions can be called either with arguments or without arguments in a C program. Also, they may or may not return any values. Hence the function prototype of a function in C is as below: Function with no argument and no return value : When a function has no arguments, it does not receive any data from the calling function.

How do you call a pointer function with 3 arguments?

Rather than the standard function calling by taping the function name with arguments, we call only the pointer function by passing the number 3 as arguments, and that’s it! Keep in mind that the function name points to the beginning address of the executable code like an array name which points to its first element.

What does the instruction int (*Ope)(int) mean in C++?

The instruction int (*ope) (int, int); defines the array of function pointers. Each array element must have the same parameters and return type. The statement result = ope [choice] (x, y); runs the appropriate function according to the choice made by the user The two entered integers are the arguments passed to the function.