Cleaned up formatting and added headers (#20103)
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@ -4,8 +4,8 @@ title: If / Elif / Else Statements
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## If / Elif / Else Statements
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The `if`/`elif`/`else` structure is a common way to control the flow of a program, allowing you to execute specific blocks of code depending on the value of some data. If the condition following the keyword `if` evaluates as `True`, the block of code will execute:
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Note that parenthesis is not used before and after the condition check as in other languages.
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The `if`/`elif`/`else` structure is a common way to control the flow of a program, allowing you to execute specific blocks of code depending on the value of some data. If the condition following the keyword `if` evaluates as `True`, the block of code will execute.
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Note: that parenthesis is not used before and after the condition check as in other languages.
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```python
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if True:
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print('If block will execute!')
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@ -24,6 +24,7 @@ _Example_:
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if 1: # 1 evaluates to true
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print('If block will execute!')
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```
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***Else statement***
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You can optionally add an `else` response that will execute if the condition is `False`:
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```python
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@ -44,6 +45,8 @@ else:
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*Note that there is no condition following the `else` keyword - it catches all situations where the condition was `False`*
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***Elif statement***
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Multiple conditions can be checked by including one or more `elif` checks after your initial `if` statement but only one condition will execute:
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```python
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@ -59,13 +62,14 @@ else:
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print("Neither will I!") #this statement does not execute
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```
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*Note only the first condition that evaluates as `True` will execute. Even though `z > 6` is `True`, the `if/elif/else` block terminates after the first true condition. This means that an `else` will only execute if none of the conditions were `True`.*
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*Note: only the first condition that evaluates as `True` will execute. Even though `z > 6` is `True`, the `if/elif/else` block terminates after the first true condition. This means that an `else` will only execute if none of the conditions were `True`.*
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***Nested if statement***
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We can also create nested if statements for decision making. Before preceding please refer to the <a href='https://guide.freecodecamp.org/python/code-blocks-and-indentation' target='_blank' rel='nofollow'>indentation guide once</a> before preceding.
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Let's take an example of finding a number which is even and also greater than '10':
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```
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python
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```python
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x = 34
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if x % 2 == 0: # this is how you create a comment and now, checking for even.
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if x > 10:
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@ -73,7 +77,7 @@ if x % 2 == 0: # this is how you create a comment and now, checking for even.
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else:
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print("This number is even, but not greater than 10")
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else:
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print ("The number is not even. So point checking further.")
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print ("The number is not even. So no point checking further.")
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```
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This was just a simple example for nested if statement. Please feel free to explore more online.
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