Python print() function

The python provides a built-in function print() to perform output operation. The print() function can print any valid data type of value. The print() function has the following syntax.

print(value, ..., sep=' ', end=' ', file=sys.stdout, flush=False)  

The print() function is used to print any data type of value like string, formatted string, integer, floating-point, complex numbers, boolean values, and None value.

The print() function prints the values to a stream, or to sys.stdout by default.
Optional keyword arguments:
file: a file-like object (stream); defaults to the current sys.stdout (console).
sep: string inserted between values, default a blank space.
end: string appended after the last value, default a new-line.
flush: whether to forcibly flush the stream.

The print() function has defined with the following function header.

def print(*values: object,
          sep: str | None = ...,
          end: str | None = ...,
          file: SupportsWrite[str] | None = ...,
          flush: bool = ...) -> none

print("This is a string")
print(f'This is formatted string')
print(100)      # Printing an integer value
print(100.99)   # Printing a floating-point value
print(10+20j)   # Printing a complex number
print(True)     # Printing a boolean value
print(None)     # Printing None value

Printing multiple data values

The print() function can be used to print more than one data value. That means, a print() function can accept more than one argument and prints all the arguments in a single line by separating each with blank space.

All the arguments of a print function may be of same data type or different.

print("Hello", "Python", "Coding")  # output: Hello Python Coding
print(10, 20, 30)         # output: 10 20 30
print(100, 'Python')      # output: 100 Python
print(100.99, True, None) # output: 100.99 True None

Changing separator (sep = 'string')

The print() function has default argument sep with a default value blank space. We can pass any string as keyword argument to define our own separator as sep = 'separator'. The sep argument must be used after all the arguments that need to be print.

print("Hello", "Python", "Coding", sep = '-')  # output: Hello-Python-Coding
print(10, 20, 30, sep = '')            # output: 102030
print(100, 'Python', sep = '_*_')      # output: 100_*_Python
print(100.99, True, None, sep = 'BSC') # output: 100.99BSCTrueBSCNone

The sep value must be a string (empty or non-empty), it does not accept any other data type value.

Changing ending string (end = 'string')

The print() function also has default argument end with a default value new-line. Every print() funciton terminates with a new-line character, this leads to start the next print() function printing from a new-line.

print("Hello", "Python", "Coding")
print(10, 20, 30)     
# output:
# Hello Python Coding
# 10 20 30    

We can pass any string as keyword argument to define our own ending string as end = 'string'. The end argument must be used after all the arguments that need to be print.

print("Hello", "Python", "Coding", end = '')
print(10, 20, 30)
# output:
# Hello Python Coding10 20 30

The end value must be a string (empty or non-empty), it does not accept any other data type value.

print("Hello", "Python", "Coding", end = '***')
print(10, 20, 30, end = 'XYZ')
# output:
# Hello Python Coding***10 20 30XYZ

The print() function return value

The print() function always returns a value None.

data = print("Hello", "Python", "Coding")
print(data)
# output:
# Hello Python Coding
# None

names = ['Ajay', 'Surya', 'Seshu', 'Gouthami', 'Heyansh', 'Josh']
print(*names, sep = '-')

# output:
# Ajay-Surya-Seshu-Gouthami-Heyansh-Josh