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Numpy string operations | startswith() function

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  • Last Updated : 29 Aug, 2020

 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

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