pythonBasic

PYTHON ARRAY Array can be handled in python by module named “ array “. They can be useful when we have to manipulate only a specific data type values. Program 1 array(),append(),insert() # array(), append(), insert() # importing "array" for array operations import array # initializing array with array values # initializes array with signed integers #Here i is signed integers arr = array.array( 'i' , [ 1 , 2 , 3 ]) print ( "The new created array is : " , end = " " ) for i in range ( 0 , 3 ):      print (arr[i], end = " " ) print ( "" ) # using append() to insert new value at end arr.append( 4 ); print ( "The appended array is : " , end = "" ) for i in range ( 0 , 4 ):      print (arr[i], end = " " )      # using insert() to insert value at specific position # inserts 3 at 1st position arr.insert( 1 , 3 ) pri

while loop when condition of given statements is True, while loop is execute. Example: i = 0 while i < 5:   print(i)   i += 1 Output: 0 1 2 3 4 Break and Continue Statements *In Python, break and continue statements can alter the flow of a normal loop. *Loops iterate over a block of code until test expression is false, but sometimes we wish to terminate the current iteration or even the whole loop without checking test expression. *The break and continue statements are used in these cases. While loop with break Statements: Example: i = 0 while i < 5:   print(i)   if i == 3:          #break the loop     break   i +=1 Output:   0 1 2 3 While loop with continue Statements: Example: i = 0 while i < 5:   i += 1   if i == 3:      #continue the loop     continue   print(i) Output: 1 2 4 5 For Loop for loop we can execute a set of statements, once for each item in a list, tuple, set etc. Examp

Python Conditions and if Statements Equals:  a == b Not Equals:  a != b Less than:  a < b Less than or equal to:  a <= b Greater than:  a > b Greater than or equal to:  a >= b if Statements If is a keyword for conditional statements. Example: a = 33 b = 200 if b > a:   print("b is greater than a") Output: b is greater than a Example: a = 33 b = 200 if b > a: print("b is greater than a") Output: Error *** Indentation Error In case of other programming language, there is a curly brackets, but in python it is different, i.e. white space. Elif statements If the previous statements were not true, try this condition. Example: a = 33 b = 33 if b > a:   print("b is greater than a")   #this condition is not true. elif a == b:   print("a and b are equal") Output:                                                                 

Operators   in Python      ·        Arithmetic operators      ·        Relational operators      ·        Logical operators      ·         Bitwise  operators      ·        Assignment   operators      ·        Special operators Arithmetic operators: Arithmetic operators are used to perform mathematical operations like addition, subtraction, multiplication and division. Example: x = 10 y = 4 # Addition of numbers add = x + y # Subtraction of numbers sub = x - y # Multiplication of number mul = x * y # Division(float) of number div1 = x / y # Division(floor) of number div2 = x // y # Modulo of both number mod = x % y # print results print(add) print(sub) print(mul) print(div1) print(div2) print(mod) output: 14 6 40 2.5 2 2 Relational Operators It compares the values. It either returns  True or  False  according to the given condition. Example: a = 55 b = 33 # a &g