For example I want to generate below output using for loop:

line1
line2
line3
line4
line5
line6
line7

CodePudding user response：

Here is how to do it with "f-strings" and the range() class object in a for loop:

for_loop_basic_demo.py:

#!/usr/bin/python3

END_NUM = 7
for i in range(1, END_NUM   1):
    print(f"line{i}")

Run command:

./for_loop_basic_demo.py

Output:

line1
line2
line3
line4
line5
line6
line7

Going further: 3 ways to print

The 3 ways I'm aware of to print formatted strings in Python are:

1. formatted string literals; AKA: "f-strings"
2. the str.format() method, or
3. the C printf()-like % operator

Here are demo prints with all 3 of those techniques to show each one for you:

#!/usr/bin/python3

END_NUM = 7
for i in range(1, END_NUM   1):
    # 3 techniques to print:

    # 1. newest technique: formatted string literals; AKA: "f-strings"
    print(f"line{i}")

    # 2. newer technique: `str.format()` method
    print("line{}".format(i))

    # 3. oldest, C-like "printf"-style `%` operator print method
    # (sometimes is still the best method, however!)
    print("line%i" % i)

    print() # print just a newline char

Run cmd and output:

eRCaGuy_hello_world/python$ ./for_loop_basic_demo.py 
line1
line1
line1

line2
line2
line2

line3
line3
line3

line4
line4
line4

line5
line5
line5

line6
line6
line6

line7
line7
line7

References:

1. ***** This is an excellent read, and I highly recommend you read and study it!: Python String Formatting Best Practices
2. Official Python documentation for all "Built-in Functions". Get used to referencing this: https://docs.python.org/3/library/functions.html
   1. The range() class in particular, which creates a range object which allows the above for loop iteration: https://docs.python.org/3/library/functions.html#func-range

CodePudding user response：

You can use f strings.\

n = 7
for i in range(1, n   1):
    print(f"line{i}")

CodePudding user response：

l=['line1','line2','line3','line4','line5','line6','line7']
for i in l:
    print(i)