C Program to Find the Length of a String without using the Built-in Function

This is a C program to find the length of a string without using the built-in function.
Problem Description:-
This program takes a string as input and finds its length without using the built-in function.
Problem Solution
1. Take a string as input and store it in the character array.
2. Using while loop count the number of characters in the array and store the result in a variable(length)
3. Print the length as output

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