Understanding the print() Function in Python: Syntax, Parameters, and Formatting

The print() function is the most common way to output data in Python. In Python 3 it is a built‑in function, while in Python 2 it behaved as a statement.

Syntax: print(*objects, sep=' ', end='\n', file=sys.stdout) Parameters: - objects: one or more objects to be printed, separated by commas. - sep: string inserted between objects (default is a single space). - end: string appended after the last object (default is a newline). - file: a file‑like object to receive the output (default is sys.stdout).

Examples of printing different data types:

print(1)                     # 1<br/>print("Hello World")        # Hello World<br/>x = 12<br/>print(x)                    # 12<br/>s = 'Hello'<br/>print(s)                    # Hello<br/>L = [1, 2, 'a']<br/>print(L)                    # [1, 2, 'a']<br/>t = (1, 2, 'a')<br/>print(t)                    # (1, 2, 'a')<br/>d = {'a': 1, 'b': 2}<br/>print(d)                    # {'a': 1, 'b': 2}

Formatted output using the C‑style % operator:

s = 'Hello'<br/>x = len(s)<br/>print("The length of %s is %d" % (s, x))  # The length of Hello is 5

Common format specifiers include:

d, i   → signed decimal integer<br/>o       → unsigned octal<br/>u       → unsigned decimal<br/>x, X   → unsigned hexadecimal (lower/upper case)<br/>e, E   → scientific notation (lower/upper case)<br/>f, F   → decimal floating point<br/>g, G   → uses %e or %f depending on value<br/>c       → single character<br/>r       → repr() of object<br/>s       → str() of object

Controlling line endings (preventing the default newline):

for x in range(10):
    print(x, end='')   # 0123456789

String concatenation example and a common mistake:

x = "Hello"
 y = "world"
 print(xy)          # NameError: name 'xy' is not defined
 print(x + y)       # Helloworld