Python Pattern Programs | Printing Stars '*' in Reverse Pyramid Shape

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 Write a program printing stars " * " in Printing Stars in Reverse pyramid Shape program

Explanation :

hello guys and welcome to Python

programming tutorials by kriisheditz in the

previous tutorial we discussed about how

to print stars in the pyramid shape

today in this tutorial we are discussing

about how to can star in this pattern

that is reverse of that pyramid shape

here is the code first we are asking the

user to enter the number of rows this

for loop is to print rows and inside

that for loop body we can see two other

for loop one is to bring to space and

another is to print star here this is

called as gross and this is called as

column right and here in the column we

can see in some places we need to print

stars in some place we need to print

space for that we are using tree follow

one is to bring close and another is to

print star and another one is to print

space okay now we will see how this code

will work first we are asking user to

enter the number of rows and number of

rows is an integer values so here we use

int function for example we'll take

number value as four okay next we can

see the for loop for I in range now 0

and minus 1 and this for loop is to

print fro the before going to that in

the range function till now we use start

and end right

that is if I want to paint the values

from 1 to 10 then I'll mention 1 and 11

here here 1 is to start and 11 is the N

value so it will give continuous value

from 1 to 10 but if you want to print

the continuous odd number from 1 to 10

then also you can use this range

function by mentioning step here that is

the another parameter to animation step

that is I want 1 3 5 7 9 so here I

mention step as to

and I'll bring this value and here we

can see one three five seven nine

continuous odd numbers by default this

step value will be 1 that means if they

didn't mention this step then it will

take 1 so it will print continuous

number okay here is an another example

here why is the starting value 0 is the

ending value and minus one is two steps

value that means I want to print the

value from five four three two one and

here we can see the values now here

we'll come back to our code okay here

for I in range now zero minus one minus

one is step numbers to starting values

zero is the ending value so if the value

of num is four then it will give four

three two one here we can see here I

value will be four here three here too

and here one then we will go to the jet

loop here ranges from zero to num - I

share num - I because here in the first

row we can see zero space like and in

the second line we can see one here

third line - and the last line free

space if you go for the num - I number

value is 4 y value is 4 so 4 - 4 0 space

here number is four Y value is 3 4 - 3 1

space 4 - 2 to stage 4 - 1 3 space this

for loop is to bring space and the next

4 look into pink star that is comes 0 -

I initially I value in before so I want

to prank for star here next I value will

be 3 so here 3 star I value B - yes to

star I value will be 1 and here 1 start

ok so here we use range from

zero - I okay now we'll run the score so

I went a number of rows s4 and here we

can see the output okay in our program

first we are asking the user to enter

the number of rows and the value will be

stored in the variable num for example I

enter the value as four okay so num

value will before and next control goes

to the for loop I in range num - 0 minus

1 here non-value is 4 and the step is

minus 1 so it will give the I value as 4

3 2 1 so I value will be 4 3 2 & 1

okay first I value Delta for control

goes to the gate for loop here ranges

from 0 to num - I that means

num well you spot and I value is 4 that

is range from 0 to 0 so this print

statement will not execute and control

goes to the next for loop here ranges

from 0 to I a value is 4 so 0 to 4 that

means it will give value as 0 1 2 3

first J value will be 0 it will go to

the print statement and it will print

star so here we can see the star okay

next in this space so here space and

control goes to here and now J value

will be incremented to 1 and again print

statement will execute so it will print

another star and end it space so control

is here again control goes to the J loop

J value will be 2 now and it will

execute the print statements so here

star nd space and control is here now J

value in 2 3

and print statement will execute so it

will print star here after this it will

come out of this print statement and it

will execute this print that is nothing

but control goes through here there is

next line next again control goes to the

main for loop

I value was for now I value is three and

it will execute this first for loop

ranges from zero to num - ID number is

for high value three so it will give

value as 0 so J value is 0 no so it will

execute this print statement that is in

this space so we can see here space and

control goes to here next control comes

to the next for loop J in the range from

0 to I value is 3 so this print

statement will execute twice first J

value will be 0 in this space next J

value will be 1 space and next J value

will be 2 it will execute trice after

this it will come out of this loop and

it will execute this print statement so

control goes to the next line here

control goes to the main for loop

previously a value of 3

now I values will be 2 and it will go to

the first for loop it is range from 0 to

num - I number is for high value is - 4

-2 various ranges from 0 to 2 so it will

give value as 0 and 1 that means this

print statement will execute life so

here we will get to space after

executing this print statement it will

come out of this loop and it will go to

the next for loop ranges from 0 to I

value is 2 so this print statement will

execute twice so control is here now so

it will print star ended space and next

again sorry stinking next after

executing twice it will come out of this

loop and it will execute next print

statement that means control is here now

control again goes to the main for loop

previously I value of two now I value is

one and here it will execute first for

loop ranges from zero to num - I number

is for a value is 1 so 4 minus 1 that is

free so ranges from 0 to 3 that means 0

1 2 this print statement will execute

price so here we'll get 3 space after

that it will come out of this loop and

it will go to the next four ranges from

0 I either use 1 that means 0 to 1 so it

will give value as 0 so this print

statement will execute 1 so it will

print star here after that it will come

out of this loop and it will go to the

print statement so control goes to the

next line next control again go to the

main for loop here this range function

will give the value as 4 3 2 1

these values are already executed so it

will come out of this loop so here

execution completed and because we

decide output okay that's it for now

thank you for watching don't forget to

subscribe my channel I will make your

next class till then I guess

Video tutorial to this program

Program :

num=int(input("enter the number of rows :"))

for i in range(num,0,-1):

for j in range(0,num-i):

print(end=" ")

for j in range(0,i):

print("*",end=" ")

print()

Output :

enter the number of rows :27

* * * * * * * * * * * * * * * * * * * * * * * * * * *

 * * * * * * * * * * * * * * * * * * * * * * * * * *

  * * * * * * * * * * * * * * * * * * * * * * * * *

   * * * * * * * * * * * * * * * * * * * * * * * *

    * * * * * * * * * * * * * * * * * * * * * * *

     * * * * * * * * * * * * * * * * * * * * * *

      * * * * * * * * * * * * * * * * * * * * *

       * * * * * * * * * * * * * * * * * * * *

        * * * * * * * * * * * * * * * * * * *

         * * * * * * * * * * * * * * * * * *

          * * * * * * * * * * * * * * * * *

           * * * * * * * * * * * * * * * *

            * * * * * * * * * * * * * * *

             * * * * * * * * * * * * * *

              * * * * * * * * * * * * *

               * * * * * * * * * * * *

                * * * * * * * * * * *

                 * * * * * * * * * *

                  * * * * * * * * *

                   * * * * * * * *

                    * * * * * * *

                     * * * * * *

                      * * * * *

                       * * * *

                        * * *

                         * *

                          *

[Program finished]

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