The startswith() function in python returns a boolean value. If the string starts with the specified prefix the function returns true else it returns false.
str.startswith(prefix[, start[, end]]) #where prefix may be a string or tuple
The startswith() function takes three parameters.
| Parameter | Description | Required / Optional |
|---|---|---|
| prefix | The value to check if the string starts with | Required |
| start | An Integer specifying at which position to start the search | optional |
| end | Ending position where prefix is to be checked within the string | optional |
The return value is always a Boolean.
| Input | Return Value |
|---|---|
| if starts with the specified prefix | True |
| if not starts with specified prefix | False |
string = "It was a good day"
output = string.startswith('was a')
# returns False
print(output)
output = string.startswith('It was ')
# returns True
print(output)
output = string.startswith('It was a good day.')
# returns True
print(output)
Output:
False True True
string = "It was a good day."
# start parameter: 3
# 'was a good day.' string is searched
output = string.startswith('was a good day', 3)
print(output)
# start: 3, end: 7
# 'was a good' string is searched
output = string.startswith('was a good', 3, 7)
print(output)
output = string.startswith('was a good', 3, 14)
print(output)
Output:
True False True
