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The for loop & while loop
A for loop is used to iterate over an iterable sequence. Iteration means to take each item out of a sequence and perform an action on it.
A while loop is going to be running as long as the provided condition is met.
Iterable sequences in python are:
There are 2 loops in python, for and while loop.
This is how we would write a for loop:
The sequence is representing an iterable object, whilst the item is representing the current item in the sequence that’s being looped through.
A while loop is going to be run as long as the condition is met.
To stop a loop, we can use the break statement.
Nested loops are loops inside loops.
Example of a for loop
Here, we are looping through the key list and printing each item in the list. Output of this code would be foo bar.
Example of a while loop
In this while loop, we are printing the variable m until its value is 5.
Example of a for loop with a break statement
In this example we are iterating over all items in abc list and if the current item is 1 we stop the loop. if not we print it. Output of this code would be 0.
Make a string named abc and set its value to Hello World. Iterate over it with a for loop, if the current item is the letter W break the loop, else print the letter.