linux计算字符，然后输出用户输入的字符串中的字符数，并且还需要一个while循环

Question

I have been trying to get linux to count the characters in a string and then out put them i want the user to be able to enter a string and the amount of characters in a string to be outputed however i have a limited understanding of linux so i really need your help thank you!

so far i have got this:

#!/bin/bash

x="This is a test"

y="${x//[^s]}"

echo "$y"

echo "${#y}"

but that only does it for one type of character and it's not in a while loop that will allow the user to quit if they wan to if you can help it would be appretiated

an example input would be "i like pie" i would want the program to output "the string you have entered has 10 characters

Answer 1

You can use read to get input from user and then use ${#var} to get the length:

#!/bin/bash

read -p "Enter some input text: " input
echo "# of chars in input: ${#input}"