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 Create Quiz Comment S sanjoy_62 Follow 0 Improve S sanjoy_62 Follow 0 Improve Article Tags : Python Python-numpy Python numpy-String Operation Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like