Writing First Python Program | Printing to Console in Python | Python Tutorials for Beginners #lec4 — Transcript

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1. 0:00so in the series of learning Python
2. 0:02programming language in the previous
3. 0:04video we have discussed like how to
4. 0:06download and install ID for python py
5. 0:10charm we have installed and python
6. 0:12interpretor you can say python
7. 0:153.1.6 we have installed right so now I
8. 0:18guess you're are all set with your
9. 0:20laptop you have python you have an ID to
10. 0:22write your programs right you have that
11. 0:24interpretor also okay because python is
12. 0:27an interpreted language so we have
13. 0:29already
14. 0:30know downloaded and installed a base
15. 0:32interpreter for our Python language I
16. 0:35hope you have done this thing now in
17. 0:38this video we'll see how to print
18. 0:41something on Console or you can say we
19. 0:44will write our first programming Python
20. 0:47and what usually we do whenever you
21. 0:49learn a new programming language the
22. 0:51first program you write is you print
23. 0:53that classical hello world on output
24. 0:57screen on the console the same thing we
25. 0:59will do we print hello world on the
26. 1:01screen on the console right in Python so
27. 1:06to print like in C we use which function
28. 1:09print a function in C++ we use C out to
29. 1:12print something on the screen in Python
30. 1:15what we use in Python 3.10
31. 1:183.x version python 1.x python 2.x python
32. 1:223.x but python 2.x version they have
33. 1:25ended the support for python 2.x uh
34. 1:28version right 2.1 .2 like this now 3.x
35. 1:34we are working on 3.10 basically the
36. 1:36recent is
37. 1:373.1.6 so in this we have a function
38. 1:40named print this is the function
39. 1:45print so this we use to print something
40. 1:48on the console okay now don't need to
41. 1:51read don't need to write any header file
42. 1:53or anything or main function or anything
43. 1:56simply you need to write what print
44. 2:01whatever you want to print the string or
45. 2:04you can say the string or whatever
46. 2:07message you want to print that we will
47. 2:09put here within these
48. 2:12parenthesis okay so I want to print
49. 2:15hello world so simply in double quotes
50. 2:18I'll write hello
51. 2:23world that's it no semicolon nothing
52. 2:26else if you will run this on your output
53. 2:29screen you will get this program this
54. 2:31output hello world if you don't print
55. 2:35anything if simply you write print and
56. 2:38you click on run on that file suppose I
57. 2:41have a file the extension of python file
58. 2:43is py right so we are simply running
59. 2:47this
60. 2:48thing empty parenthesis it's okay it
61. 2:53will run what it will print just a blank
62. 2:57line okay the nothing would be shown
63. 3:00just a blank line a cursor would be here
64. 3:03nothing would be shown if I want if you
65. 3:06execute two print function then one and
66. 3:08two two blank line would be shown
67. 3:10something like this
68. 3:13right so you can say it will the Sprint
69. 3:17function will produce an invisible new
70. 3:21line character new line means add a new
71. 3:24line so it will produce an invisible new
72. 3:27line character because of that that new
73. 3:30line character we see you know a new
74. 3:35blank line on your screen right I'll
75. 3:38show you practically also now whatever
76. 3:40you want to print you just write Within
77. 3:43These codes we write hello world simply
78. 3:46write hello world so now let me do some
79. 3:49experiment with this uh what you have to
80. 3:52write down this how you can write down
81. 3:54this thing if you don't put this
82. 3:57closing uh Cotes what type of error you
83. 3:59will will get and these things let's
84. 4:02just do practical on this uh print
85. 4:04function and see before going to
86. 4:06practical let me just this this is what
87. 4:08in Python the syntax is python in Python
88. 4:113 3.x in Python 2.x the previous uh
89. 4:15versions print was just a statement it
90. 4:18was not a function so what we used to
91. 4:20write in that case print and Hello World
92. 4:25whatever you need to print you can just
93. 4:28write down in these quotes so print
94. 4:30hello world that's it no parenthesis so
95. 4:33it was considered it was as a statement
96. 4:36in Python 2.x but here in Python 3 it is
97. 4:40a function so if you are using python
98. 4:423.x version right then if you write
99. 4:46something like this if you don't put
100. 4:47these parenthesis you will get error
101. 4:49message syntax error message right in if
102. 4:53you are using python 2.x version you can
103. 4:55write down print something like this so
104. 4:57let's just do practical of this thing so
105. 4:59we have opened our pip charm IDE and let
106. 5:03me just first change the color so you
107. 5:06can go to file if you want to change if
108. 5:09you're comfortable with this color you
109. 5:11can go for this but I'm not comfortable
110. 5:13so go to setting and appearance in
111. 5:16appearance just theme and I want either
112. 5:20this this light or window 10 light this
113. 5:25one so you can go for anyone uh from
114. 5:29here you can uh set these themes okay so
115. 5:33now let's change this color and just
116. 5:36click okay now I guess you can see it
117. 5:38clearly the code fine now oh we have
118. 5:42created our first project in the
119. 5:43previous video and first file first. py
120. 5:47okay if you want to create another file
121. 5:49what you have to do in the first project
122. 5:51on first project just click right click
123. 5:53new and file and just name your file
124. 5:57okay so I'm not going to to create in
125. 6:01the first py only extension is py we are
126. 6:05printing so okay how to print just use
127. 6:09this Sprint function
128. 6:11print fine let me just write down again
129. 6:14p r i n print and see it is showing you
130. 6:19this is the you know beauty of this ID
131. 6:21Auto completion and see the print syntax
132. 6:24it is showing here you can write down
133. 6:26this values SCP end file flash whatever
134. 6:29these things that also one by one we'll
135. 6:30be discussing but right now just if I
136. 6:33just click enter it will give me like
137. 6:37these parenthesis automatically so now
138. 6:40Within These parenthesis I'm
139. 6:43adding
140. 6:45hello
141. 6:47world okay now let me just run this for
142. 6:51you first see from here I have to select
143. 6:54here main file is selected so I am going
144. 6:57to select current file so current file
145. 6:59is first. py current file means I'm
146. 7:02working in this file and let's just or
147. 7:05you can click in this this is the Run
148. 7:08button or you can just uh right click
149. 7:10and this run first click on this okay
150. 7:15now here it is going to run now and now
151. 7:18it will print on your screen hello world
152. 7:20first time you know it is taking some
153. 7:22time because of the indexing and all so
154. 7:26see you can see here hello world fine
155. 7:30if I miss this semicolon this sorry this
156. 7:34um double quote closing double quote as
157. 7:38you can see a red red underline means
158. 7:42there is something wrong there is an
159. 7:44error okay so this is what you can say
160. 7:48uh this ID will give you these kind of
161. 7:51things if you use ID this is you can say
162. 7:53some features or uh some advantages of
163. 7:56using ID see missing closing quotes So
164. 8:00from here only you will come to know
165. 8:02yeah you have missed quotes or if you
166. 8:04run this here also you will get see now
167. 8:07type of error C syntax error syntax
168. 8:10error it is a syntax error so types of
169. 8:13error there are many types of error okay
170. 8:16that also uh with these par with the
171. 8:19code we will be seeing this is what
172. 8:21syntax error syntax me means what there
173. 8:24are some rules to write programs in any
174. 8:28you know programming langu language and
175. 8:30those rules are known as syntax if you
176. 8:32don't follow the
177. 8:34syntax then it will give syntax error so
178. 8:38now syntax or you can say like we have
179. 8:41grammar rules okay same in programming
180. 8:44language also we have some rules to
181. 8:46write down these programs so these are
182. 8:48syntax known as syntax if uh now it is
183. 8:52syntax error because synex is what in
184. 8:54print whatever string the message which
185. 8:58is not a code actually see print is a
186. 9:00code it will do something it will tell
187. 9:02The Interpreter to do something but this
188. 9:04hello world is rather than hello world I
189. 9:07can write Jenny's lectures I can write
190. 9:10anything else like you are the best so
191. 9:13this is what just a message it's not a
192. 9:15code so other than the code whatever you
193. 9:18write the message or the string that we
194. 9:19will put in codes okay single quotes as
195. 9:23well as double quotes that also we'll
196. 9:25discuss when to put single code when to
197. 9:27put double quote okay now right now now
198. 9:29I'm putting double code because actually
199. 9:31I am from C and C++ background so uh to
200. 9:34write down string I used to put the
201. 9:36string the sequence of characters of
202. 9:38string in double Cotes okay so now see
203. 9:42syntax error it will give syntax error
204. 9:44unterminated string literal hello world
205. 9:47this is a string literal it is
206. 9:48unterminated you haven't terminated this
207. 9:51thing detected at line number one line
208. 9:53number one this is also a skill to
209. 9:57identify what is the error type of eror
210. 10:00in which line and all okay so you have
211. 10:03to you know learn this thing also
212. 10:07parall okay now see you can see one
213. 10:09Arrow here you have started this string
214. 10:12literal but you haven't terminated here
215. 10:14in line number one or if you're not
216. 10:17getting what is the error just simply
217. 10:20the error syntax error this thing copy
218. 10:23this thing open your Google paste that
219. 10:26and just click enter okay or more
220. 10:30specifically you can write this error in
221. 10:31Python in whatever programming language
222. 10:33you are you know practicing you're
223. 10:37learning so generally first uh you know
224. 10:39that link would be from stack Overflow
225. 10:41so there someone has already asked this
226. 10:43type of questions and you will get many
227. 10:45answers simple okay so now let's just
228. 10:49first what you have to do close this now
229. 10:53see after
230. 10:54closing this is what syntax highlighting
231. 10:57also you need to know the Sprint is what
232. 10:58in Black back the string is what in
233. 11:02green this Hello World Plus these codes
234. 11:05in green color okay and if you miss this
235. 11:08and these uh what you can
236. 11:11say sorry this Sprint is what in not in
237. 11:14Black it's in blue and these parenthesis
238. 11:18are in Black so if you remove this
239. 11:21double coat from here this parenthesis
240. 11:23and ending of the par parenthesis this
241. 11:25is also in green color so there is
242. 11:26something wrong you can identify okay
243. 11:30okay now put this one and just run this
244. 11:34again so it will print now hello world
245. 11:36whatever you want to print you can print
246. 11:38now if you don't put this
247. 11:40parenthesis it will give an error see
248. 11:43you can see the red underline here again
249. 11:45okay let me just run this and it will
250. 11:48give again some error see it is giving
251. 11:50syntax error missing parenthesis in call
252. 11:53to print did you mean this print you are
253. 11:57calling print calling means print is a
254. 11:59function so we are calling print but
255. 12:01missing parenthesis missing parenthesis
256. 12:03because we are using 3o exposion so here
257. 12:06you have to put these parenthesis
258. 12:10okay now okay what you need to do blank
259. 12:14print you can call see blank print also
260. 12:18you can call it will print nothing but a
261. 12:21blank line it will call an invisible new
262. 12:24line uh character so again if I write
263. 12:28print and
264. 12:30call you will see two blank new line
265. 12:33same 3 four five print blank you will
266. 12:35call these blank line would be increased
267. 12:38like this I hope now print is clear to
268. 12:40you now in next video I'll discuss a
269. 12:44coding exercise with you guys okay so I
270. 12:47hope every point about print function is
271. 12:49clear to you guys how to write down your
272. 12:51first program how to print something on
273. 12:52Console in Python now in the next video
274. 12:55we'll see a coding exercise related to
275. 12:57this print function so I'll see you in
276. 12:59the next video till then bye-bye take
277. 13:01care