intro to programming - syntax from chp 2

Output with print()

• Use to display text or variables

• Combine text and variables with commas

• Customize output with or blank lines

Input with input()

• input() gets user input as a string

• Wrap with int() or float() to convert to numbers

• Example: age = int(input("Enter age: "))

Expressions and Operators

• Arithmetic: +, -, *, /

• Exponentiation: **

• Integer division: //

• Modulus (remainder): %

• Operator precedence follows math rules (PEMDAS)

Assignment Statements

• Assign values with =

• Reassign variables anytime

• Swap values: x, y = y, x

• Simultaneous assignment is allowed

Definite Loops with for

• Loop runs a fixed number of times

• Use range(n) for counting

• Loop variable can be named or _ if unused

• Example: for _ in range(3): print("Repeat")