Why is else invalid syntax python




















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Am I missing something obvious? Consequently, statements in line 3,4 and 5 will execute only when the if condition is true, on the other hand statements in line 6 and 7 will always execute no matter what.

Python shell responds somewhat differently when you type control statements inside it. This is not the case with control statements, Python interpreter will automatically put you in multi-line mode as soon as you hit enter followed by an if clause.

Consider the following example:. Python shell shows Python shell will not automatically indent your code, you have to do that yourself. When you are done typing statements in the block hit enter twice to execute the statement and you will be taken back to the normal prompt string. The programs we have written so far ends abruptly without showing any response to the user if the condition is false. Most of the time we want to show the user a response even if the condition is false.

We can easily do that using if-else statement. An if-else statement executes one set of statements when the condition is true and a different set of statements when the condition is false.

In this way, a if-else statement allows us to follow two courses of action. The syntax of if-else statement is as follows:. When if-else statement executes, condition is tested if it is evaluated to True then statements inside the if block are executed.

However, if the condition is False then the statements in the else block are executed. Now our program shows a proper response to the user even if the condition is false which is what is wanted. In an if-else statement always make sure that if and else clause are properly aligned. Failing to do will raise a syntax error.

For example:. We can also write if or if-else statement inside another if or if-else statement. This can be better explained through some examples:. Here we have written a if statement inside the another if statement. The inner if statement is known as nested if statement. In this case the inner if statement belong to the outer if block and the inner if block has only one statement which prints "Congratulations you are eligible for loan".

First the outer if condition is evaluated i. If it is True then "Congratulations you are eligible for loan" is printed to the console. If we want to explicitly check if the value is explicitly set to True or False , we can use the is keyword. An else statement is part of an if statement. If your if statement ran, your else statement will never run. In the REPL it must be written on the line after your last line of indented code.



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