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The modulo operator is a binary (2 argument) operator which returns a single value, and can be used for both numeric calculations and strings: x = 5 % 2 print(x) # prints "1" y = "hello %s" % ...
Answer
#3: Post edited
by
MattDMo
·
2023-06-28T19:00:06Z (over 1 year ago)
added link to f-strings in docs
- The modulo operator is a binary (2 argument) operator which returns a single value, and can be used for both numeric calculations and strings:
- x = 5 % 2
- print(x) # prints "1"
- y = "hello %s" % 3
- print(y) # prints "hello 3"
- When you use a modulo operator for string substitution, you are creating a single string as the result. In your example, you then pass this created string directly to `print()` as a single argument. There is no need for a comma because commas are used to separate arguments, and you have only a single argument: the *result* of the string substitution. The substitution is not being performed by `print()`, but by the modulo operator itself, as you can see if you construct the string in an interactive Python session without ever calling `print()`:
- >>> animal = "giraffe"
- >>> age = 25
- >>> "A %s can live up to %d years" %(animal,age)
- 'A giraffe can live up to 25 years'
- To put it another way, you don't put a comma before the modulo operator for the same reason you don't put a comma before the plus operator (or any other kind of 2-argument operator):
- print(2 + 2) # single argument to print() with the value 4
- ## String formatting
- Although it doesn't directly relate to your specific question, be aware that using the modulo operator for string formatting is no longer recommended for new Python code.
- You should either use the `format()` method:
- print("A {} can live up to {} years".format(animal, age))
or in Python 3.6 or above, the even more readable f-strings:- print(f"A {animal} can live up to {age} years")
- The modulo operator is a binary (2 argument) operator which returns a single value, and can be used for both numeric calculations and strings:
- x = 5 % 2
- print(x) # prints "1"
- y = "hello %s" % 3
- print(y) # prints "hello 3"
- When you use a modulo operator for string substitution, you are creating a single string as the result. In your example, you then pass this created string directly to `print()` as a single argument. There is no need for a comma because commas are used to separate arguments, and you have only a single argument: the *result* of the string substitution. The substitution is not being performed by `print()`, but by the modulo operator itself, as you can see if you construct the string in an interactive Python session without ever calling `print()`:
- >>> animal = "giraffe"
- >>> age = 25
- >>> "A %s can live up to %d years" %(animal,age)
- 'A giraffe can live up to 25 years'
- To put it another way, you don't put a comma before the modulo operator for the same reason you don't put a comma before the plus operator (or any other kind of 2-argument operator):
- print(2 + 2) # single argument to print() with the value 4
- ## String formatting
- Although it doesn't directly relate to your specific question, be aware that using the modulo operator for string formatting is no longer recommended for new Python code.
- You should either use the `format()` method:
- print("A {} can live up to {} years".format(animal, age))
- or in Python 3.6 or above, the even more readable [f-strings](https://docs.python.org/3/reference/lexical_analysis.html#f-strings):
- print(f"A {animal} can live up to {age} years")
#2: Post edited
- The modulo operator is a binary (2 argument) operator which returns a single value, and can be used for both numeric calculations and strings:
- x = 5 % 2
- print(x) # prints "1"
- y = "hello %s" % 3
- print(y) # prints "hello 3"
- When you use a modulo operator for string substitution, you are creating a single string as the result. In your example, you then pass this created string directly to `print()` as a single argument. There is no need for a comma because commas are used to separate arguments, and you have only a single argument: the *result* of the string substitution. The substitution is not being performed by `print()`, but by the modulo operator itself, as you can see if you construct the string in an interactive Python session without ever calling `print()`:
- >>> animal = "giraffe"
- >>> age = 25
- >>> "A %s can live up to %d years" %(animal,age)
- 'A giraffe can live up to 25 years'
- To put it another way, you don't put a comma before the modulo operator for the same reason you don't put a comma before the plus operator (or any other kind of 2-argument operator):
print(2 + 2) # single argument to print() with the value 4
- The modulo operator is a binary (2 argument) operator which returns a single value, and can be used for both numeric calculations and strings:
- x = 5 % 2
- print(x) # prints "1"
- y = "hello %s" % 3
- print(y) # prints "hello 3"
- When you use a modulo operator for string substitution, you are creating a single string as the result. In your example, you then pass this created string directly to `print()` as a single argument. There is no need for a comma because commas are used to separate arguments, and you have only a single argument: the *result* of the string substitution. The substitution is not being performed by `print()`, but by the modulo operator itself, as you can see if you construct the string in an interactive Python session without ever calling `print()`:
- >>> animal = "giraffe"
- >>> age = 25
- >>> "A %s can live up to %d years" %(animal,age)
- 'A giraffe can live up to 25 years'
- To put it another way, you don't put a comma before the modulo operator for the same reason you don't put a comma before the plus operator (or any other kind of 2-argument operator):
- print(2 + 2) # single argument to print() with the value 4
- ## String formatting
- Although it doesn't directly relate to your specific question, be aware that using the modulo operator for string formatting is no longer recommended for new Python code.
- You should either use the `format()` method:
- print("A {} can live up to {} years".format(animal, age))
- or in Python 3.6 or above, the even more readable f-strings:
- print(f"A {animal} can live up to {age} years")
#1: Initial revision
The modulo operator is a binary (2 argument) operator which returns a single value, and can be used for both numeric calculations and strings:
x = 5 % 2
print(x) # prints "1"
y = "hello %s" % 3
print(y) # prints "hello 3"
When you use a modulo operator for string substitution, you are creating a single string as the result. In your example, you then pass this created string directly to `print()` as a single argument. There is no need for a comma because commas are used to separate arguments, and you have only a single argument: the *result* of the string substitution. The substitution is not being performed by `print()`, but by the modulo operator itself, as you can see if you construct the string in an interactive Python session without ever calling `print()`:
>>> animal = "giraffe"
>>> age = 25
>>> "A %s can live up to %d years" %(animal,age)
'A giraffe can live up to 25 years'
To put it another way, you don't put a comma before the modulo operator for the same reason you don't put a comma before the plus operator (or any other kind of 2-argument operator):
print(2 + 2) # single argument to print() with the value 4