Numpy string operations | startswith() function Last Updated : 29 Aug, 2020 Comments Improve Suggest changes Like Article Like Report numpy.core.defchararray.startswith() function returns a boolean array which is True where the string element in starts with prefix, otherwise False. Syntax : numpy.core.defchararray.startswith(arr, prefix, start = 0, end = None) Parameters : arr : [array-like of str or unicode] Array-like of str. prefix : [str] Input string. start, end : [int, optional] With optional start, test beginning at that position. With optional end, stop comparing at that position. Return : [ndarray] Return the array of booleans. Code #1 : Python3 # Python program explaining # numpy.char.startswith() function # importing numpy as geek import numpy as geek arr = "GeeksforGeeks - A computer science portal" prefix = 'Geeks' gfg = geek.char.startswith(arr, prefix, start = 0, end = None) print (gfg) Output : True Code #2 : Python3 # Python program explaining # numpy.char.startswith() function # importing numpy as geek import numpy as geek arr = "GeeksforGeeks - A computer science portal" prefix = 'None' gfg = geek.char.startswith(arr, prefix, start = 0, end = None) print (gfg) Output : False Comment More infoAdvertise with us Next Article Numpy string operations | startswith() function S sanjoy_62 Follow Improve Article Tags : Python Python-numpy Python numpy-String Operation Practice Tags : python Similar Reads Numpy string operations | rpartition() function In the numpy.core.defchararray.rpartition() function, each element in arr, split the element as the last occurrence of sep, and return 3 strings containing the part before the separator, the separator itself, and the part after the separator. If the separator is not found, return 3 strings containin 1 min read numpy string operations | rfind() function numpy.core.defchararray.find(arr, sub, start=0, end=None) is another function for doing string operations in numpy.It returns the highest index in the string where substring sub is found for each element in arr.It returns -1 if sub is not contained within [start, end]. Parameters: arr : array_like o 2 min read Numpy string operations | rindex() function numpy.core.defchararray.rindex() function, raises ValueError when the substring sub is not found. Calls str.rindex element-wise. Syntax : numpy.core.defchararray.rindex(arr, sub, start = 0, end = None) Parameters : arr : [array-like of str or unicode] Array-like of str . sub : [str or unicode] Input 1 min read Numpy - String Functions & Operations NumPy String functions belong to the numpy.char module and are designed to perform element-wise operations on arrays. These functions can help to handle and manipulate string data efficiently.Table of ContentString OperationsString Information String Comparison In this article, we’ll explore the var 5 min read numpy string operations | find() function numpy.core.defchararray.find(arr, sub, start=0, end=None) is another function for doing string operations in numpy.It returns the lowest index in the string where substring sub is found for each element in arr within the range start to end.It returns -1 otherwise. Parameters: arr : array_like of str 2 min read Like