PROBLEM SOLVING AND PYTHON PROGRAMMING UNIT-2

PROBLEM SOLVING AND PYTHON PROGRAMMING UNIT-2

• 1.
  Unit-2
• 2.
  • Python Interpretermode • Python interactive mode • Features • Comment(#) • Statements –Print() –Assignment =
• 3.
  Tokens/Programming Construct • Keywords •Literals • Escape Sequence • Delimiter • values • Identifier/variables • Data type • operator
• 4.
  keywords • if, elif,while, for, break, else, pass, True, False, return, and, or, not
• 5.
  Literals • Numeric: – Digits(0-9) –-/+ – Decimal point – Int:25 – Float:25.6 • String: • Sequence of character: –‘hello’, –“hello”
• 6.
  Escape sequence • Non-printablecharacter • ‘/n’ • ‘/t’
• 7.
  Delimiter • Symbols thatperform 3 roles – Grouping( ) ,[ ], { } – Punctuation : ; . @ – Assignment +=,-=,*= – Bitwise assignment&=,!=
• 8.
  Values • Basic unitof data • Int:2 • Float:67.9 • String:’hello’
• 9.
  Data type • Int: –+/- – Range: -2,147,483,648 to +2,147,483,648 – Decimal(10): 27 – Octal(8):Oo27 – Hexadecimal(16):OX27 – Binary(0 or 1)
• 10.
  • Float: –Decimal andfractional –Scientific notation: •+/- •Mantissa •Exponent •Boolean:True /False •None type:
• 11.
  • Complex –Real andimaginary: z=7+6j • String • Sequence of character • List: [ 11,12,13] • Tuples:(11,12,13) • Set:{ 11,1,2,3} • Dictionary: {ab:12,ad:15}
• 12.
  Identifier/variables/data type • Infosys