How to get all the characters before the last of a string

public static void main(string args) {

string str1="abcdefghij";

string str=(,;Truncate the string from the beginning to the penultimate character and convert it to string form.

If you're talking about all the characters before the decimal point, it's the following paragraph:

public static void main(string args) {

string str1="";

int num=0;

while((".", num))!=-1){num=".",num)+1;

string str=(,num-1)).tostring();

You can calculate the number of strings by counting the number of numbers and letters.

Look for the character after the last B in A.

a="abcdefghijabcdefghijabcdefghij"

b="h"print(a[:]

Or: str=""

) found""The index of the location

str["") -1] is the required character.

1. Description.

Python can use a simple slicing method to remove the last character of a string.

2、**。s = 'abcdef'

print(s[:-1])

Output 3, remarks.

s[:-1] means that the s string takes the first character from the 0th character to the penultimate character, so as to achieve the purpose of removing the last character.

import re

text = ""

m = '[^-', text)

if m:print

else:print 'not search'

This can be implemented using regular expressions to find the last multiple non-content import re

text = ""

m = '[^-', text)

if m:print

else:print 'not search'

This can be implemented using regular expressions to find out the last multiple non-contents.

With this you can:

str1 = 'gene_id "625|624"; transcript_id "10_1"; cluster_id "10"'

for item in m:

if not :

print(item + ' ', end = '') can be exported.

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1. Open the excel document that you will process.

2. Enter =right() in the blank cell on the right.

3. Move the cursor to the function brackets and select or enter the cells of the obtained string and enter a comma.

4. Enter the find() function after the comma, and enter the characters you want to get the string before Sun Laoshi with double quotation marks.

5. Enter the comma again and select the string that was obtained.

6. After entering, complete the string acquisition.

The key is to use the strlen function to find the length of the string first, and then subtract one include

#include

void main()