PYTHON

python f string literal

# This answer might be long, but it explains more python f-strings, how to use them and when to use them.
# Python f-strings are used to write code faster.
# Here is an example:
name = "George"
age = 16
favorite_food = "pizza"

# Instead of doing this:
print("My name is", name, ", my age is", age, ", and my favorite food is", favorite_food)

# Or this:
print("My name is "+ name +", my age is "+ str(age)+ ", and my favorite food is "+ favorite_food)

# You could do this:
print(f"My name is {name}, my age is {age}, and my favorite food is {favorite_food}")

# You see that the code looks a little cleaner, and as you start using f-strings you realize you write much faster.
"""
Why put the f before the string, you ask?
Well if you didnt, the output would literally be {name} instead of the actual variable
One more thing: this is fairly new and only works with python 3.6 and higher.
"""

f string in python

# f-strings are short for formatted string like the following
# you can use the formatted string by two diffrent ways
# 1
name = "John Smith"
print(f"Hello, {name}")		# output = Hello, John Smith

# 2
name = "John Smith"
print("Hello, {}".format(name))		# output = Hello, John Smith

python f string

>>> name = "Eric"
>>> age = 74
>>> f"Hello, {name}. You are {age}."
'Hello, Eric. You are 74.'

python fstring

#python3.6 is required
age = 12
name = "Simon"
print(f"Hi! My name is {name} and I am {age} years old")

f string python

# f-string is a format for printing / returning data
# It helps you to create more consise and elegant code

########### Example program ##############

# User inputs their name (e.g. Michael Reeves)
name = input()
# Program welcomes the user
print(f"Welcome to grepper {name}")

################ Output ################

""" E.g. Welcome to grepper Michael Reeves """

What is the use of f in python?

The f or F in front of strings tells Python to look at the values inside {} and substitute them with the values of the variables if exist.
Example:
agent = 'James Bond'
num = 9

# old ways
print('{0} has {1} number '.format(agent, num))

# f-strings way
print(f'{agent} has {num} number')

OUTPUT:
James Bond has 9 number

python f string

>>> name = "Eric"
>>> age = 74
>>> f"Hello, {name}. You are {age}."
'Hello, Eric. You are 74.'

f string python

# ------------------- string format, f-string ----------------------------

# {} is placeholder
num1 = 5
num2 = 3                
print(f'{num1} times {num2} is {num1 / num2:.2f}')  #2f means print to 2 decimal precision
#5 times 3 is 1.67

#explicit call format() method
number1 = 'One'
number2 = 'Two'
number3 = 'Three'

# default(implicit) order
default_order = "{}, {} and {}".format(number1,number2,number3)
print(default_order)
# One, Two and Three

# order using positional argument
positional_order = "{1}, {0} and {2}".format(number1,number2,number3)
print(positional_order)
# Two, One and Three

# order using keyword argument
keyword_order = "{i}, {j} and {k}".format(j=number1,k=number2,i=number3)
print(keyword_order)
# Three, One and Two

python f string

# f-strings help in string concatenation
name = 'Psych4_3.8.3'
age = 23
job = 'programmer'

#USING OLD METHOD
print("I am %s a %t of age %u", %(name, job, age))

# USING F-STRING
print(f"I am {name} a {job} of age {age}")
# here you can even see whcih value is inserted in which place....
# the f means that it is an f string. DONT FORGET IT!!

python f string

import random
name = input("What is your name? ") #Gets needed input
value = int(input(f"Give random value, {name}: ")) # The {name} means it puts the variable name there
multiplier = random.randint(3, 6)
print("Now multiplying your value...")
complete_value = multiplier * value
print(f"Your value is... {complete_value}") # Same here with complete_value

f strings

var = 1
print(f'number {var}')

f string python

num_01, num_02, num_03 = 1, 2, 3
print(f"Numbers : {num_01}, {num_02}, {num_03}")

"""
>>> Numbers: 1, 2, 3
"""

Python f string example

name = "Sleepy Joe"
age = 1300

print(f"{name} is {age:,} years old")

f string in python

# Ques.1
num = int(input("Enter your number: "))

for i in range(1, 11):
    # print(str(num) + " × " + str(i) + " = " + str(i*num))
    # you can't add variables
    
    print(f"{num} × {i} = {num*i}")
    # you can add variables

in python f then string meaning

>>> import datetime
>>> name = 'Fred'
>>> age = 50
>>> anniversary = datetime.date(1991, 10, 12)
>>> f'My name is {name}, my age next year is {age+1}, my anniversary is {anniversary:%A, %B %d, %Y}.'
'My name is Fred, my age next year is 51, my anniversary is Saturday, October 12, 1991.'
>>> f'He said his name is {name!r}.'
"He said his name is 'Fred'."

python f strings

'''
In python, rather than adding pieces of string together, you can use
f-strings to insert variables into strings. This makes your code much
more easier to read.
'''

# OLD - WITHOUT F-STRINGS
name = 'Bob'
age = 12
print('This is ' + name + ', he is ' + age + ' years old.')

# NEW - WITH F-STRINGS
print(f'This is {name}, he is {age} years old') # Note the f in front

f string python

#f string can be used insted of + in print statments

age = 33
#instead of:
print("I am " + str(age)) #output: I am 33
#do this
print(f"I am {age}")     #output: I am 33