# 8.14. Exercises¶

Write a function named

`num_test`

that takes a number as input. If the number is greater than 10, the function should return “Greater than 10.” If the number is less than 10, the function should return “Less than 10.” If the number is equal to 10, the function should return “Equal to 10.”Write a function that reverses its string argument.

Write a function that mirrors its string argument, generating a string containing the original string and the string backwards.

Write a function that removes all occurrences of a given letter from a string.

Write a function

`replace(s, old, new)`

that replaces all occurences of`old`

with`new`

in a string`s`

:test(replace('Mississippi', 'i', 'I'), 'MIssIssIppI') s = 'I love spom! Spom is my favorite food. Spom, spom, spom, yum!' test(replace(s, 'om', 'am'), 'I love spam! Spam is my favorite food. Spam, spam, spam, yum!') test(replace(s, 'o', 'a'), 'I lave spam! Spam is my favarite faad. Spam, spam, spam, yum!')

*Hint*: use the`split`

and`join`

methods.Write a function

`findHypot`

. The function will be given the length of two sides of a right-angled triangle and it should return the length of the hypotenuse. (Hint:`x ** 0.5`

will return the square root, or use`sqrt`

from the math module)Write a function called

`is_even(n)`

that takes an integer as an argument and returns`True`

if the argument is an**even number**and`False`

if it is**odd**.Now write the function

`is_odd(n)`

that returns`True`

when`n`

is odd and`False`

otherwise.Write a function

`is_rightangled`

which, given the length of three sides of a triangle, will determine whether the triangle is right-angled. Assume that the third argument to the function is always the longest side. It will return`True`

if the triangle is right-angled, or`False`

otherwise.Hint: floating point arithmetic is not always exactly accurate, so it is not safe to test floating point numbers for equality. If a good programmer wants to know whether

`x`

is equal or close enough to`y`

, they would probably code it up asif abs(x - y) < 0.001: # if x is approximately equal to y ...