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You can use a variable in an expression with

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Cards (20)

Section 1

(20 cards)

You can use a variable in an expression with

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Other variables and values

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The * operator is used for multiplication when it operates on two integers or floating point values. However,

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When * is used on a string value along with an integer, it becomes the string replicator operator. >>>'Alice' * 5 AliceAliceAliceAliceAlice

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The meaning of an operator may change depending on

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The data type next to it

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Data type

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Category for values

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Overwriting a variable

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When a variable is assigned a new value

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Floating point numbers

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Values with a decimal point

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The + is the addition operator when it operates on two integers or floating point values. However,

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When + is used on two string values, it just places the two strings together >>>Alice + Bob AliceBob

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assignment statement

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Where you store values in variables

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Expressions

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Consist of values and operators

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Every value belongs to

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Exactly one data type

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Variable

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Where you store a single valuej

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Integers

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Values that are whole numbers ...-2,-1,0,1,2...

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Assignment statements consist of

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A variable name, an equal sign and the value to be stored. >>>spam = 40 >>>spam 40 >>>eggs = 2 >>>spam + eggs 42

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String

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A sequence of characters that is surrounded by single quotes

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variable initialization

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The first time a value is stored in a variable

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3 most common data types

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Integers Floating point numbers Strings

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If you use + to join an interger with a string

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Python will not know how to handle it and display an error message.

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Value

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A number

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Operators

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* / // % + -

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You could only use * for

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Two numeric values or with an integer with a string. Otherwise an error message will appear.

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