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pow() function in Python – QuanTriMang.com

What is the pow function in Python? Squared in Python how? Let's find out together!

Python is a high-level, interpreted, object-oriented programming language with dynamic semantics. Its high-level built-in data structures, combined with dynamic typing and dynamic binding, make it very attractive to the field of Rapid Application Development, as well as for use as a scripting language or adhesive language for connecting existing components together. Python's simple, easy-to-learn syntax emphasizes readability and thus reduces program maintenance costs. Python supports modules and packages, encouraging program modularity and code reuse. The Python interpreter and extended standard library are available in source or binary form for free for all major platforms and can be distributed without spending a dime.

Pow in Python is a common function. Therefore, anyone who uses this programming language needs to know it.

What is the Python pow function?

In Python, the pow() function is used to calculate the power of a number. It evaluates two arguments, the base and the exponent, and returns the result of raising the base to the power of the exponent.

The pow() function is built into Python, which means you don't need to import an external library or module to use it. It is a very useful function, often used in arithmetic and scientific calculations.

Common cases of using pow() function in Python

The table below summarizes the different cases for applying the pow() function in Python:

Cases of using Python pow function

Syntax of pow() function in Python

pow(x, y[, z])

The pow(x, y) function is equivalent to:

x**y

Parameters of the pow() function

The pow() function has 3 parameters:

  • x: facility number
  • y: exponent
  • z: module (optional)

Possible situations with pow() parameters

x y z
Integers (positive, negative) Positive integer May or may not be
Integers (positive, negative) Negative integers There shouldn't be

Return value from pow()

The return value of pow() depends on the type of parameter passed.

x y z Return value
Positive integer Positive integer N/A Integer
Positive integer Negative integers N/A Real number
Negative integers Positive integer N/A Integer
Negative integers Negative integers N/A Integer
Integers (positive, negative) Positive integer Integers (positive, negative) Integer

Example 1: how does pow() work?

# x, y là số dương (x**y)
print(pow(2, 2))

# x là số âm, y là số dương
print(pow(-2, 2))

# x là số dương, y là số âm (x**-y)
print(pow(2, -2))

# x, y là số âm
print(pow(-2, -2))

When you run the program, the output will be:

Example 2: Python code that analyzes positive and negative number cases

# positive x, positive y (x**y)
print("Positive x and positive y : ", end="")
print(pow(4, 3))

print("Negative x and positive y : ", end="")
# negative x, positive y (-x**y)
print(pow(-4, 3))

print("Positive x and negative y : ", end="")
# positive x, negative y (x**-y)
print(pow(4, -3))

print("Negative x and negative y : ", end="")
# negative x, negative y (-x**-y)
print(pow(-4, -3))

Result:

Positive x & positive y : 64
Negative x & positive y : -64
Positive x & negative y : 0.015625
Negative x & negative y : -0.015625

Example 3: pow() has 3 parameters

x = 7
y = 2
z = 5

print(pow(x, y, z))

Return value:

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