Use `if` to run code only when a condition is `True`
Syntax:
`if condition:`
` code`
Example:
`if x > 0:`
` print(“Positive”)`
Use `elif` for additional conditions
Example:
`if x > 0:`
` print(“Positive”)`
`elif x < 0:`
` print(“Negative”)`
Use `else` for the default case
Example:
`if x > 0:`
` print(“Positive”)`
`else:`
` print(“Not positive”)`
Use comparison operators:
`==`
`!=`
`>`
`<`
`>=`
`<=`
Use logical operators:
`and`
`or`
`not`
Combine conditions:
`if x > 0 and x < 10:`
Check membership:
`if item in my_list:`
Check identity:
`if a is b:`
Use indentation to define the code block
Use `pass` when no action is needed
Example:
`if x > 0:`
` pass`
Nest `if` statements when needed
Example:
`if x > 0:`
` if x < 10:`
` print(“Between 1 and 9”)`