For Python, we could assign a string to a variable without defining it in the first place:
>>> x="This is great" >>> type(x) <class 'str'>
For the formula to convert an effective rate to another one, the second input value is a string. For example, 's2a'
:
>>> type='s2a' >>> type[0] 's' >>> len(type) 3
The len()
function shows the length of a string, see the following code:
>>>x='Hello World!' >>>len(x) 13
Here are several widely used ways to select substring:
string='Hello World!' # find the length of the string n_length=len(string) print(n_length) # the number of appearance of letter l n=string.count('l') print(n) # find teh locatoin of work of 'World' loc=string.index("World") print(loc) # number of spaces n2=string.count(' ') print(n2) print(string[0]) # print the first letter print(string[0:1]) # print the first letter (same as above) print(string[0:3]) # print the first three letters print...