I want to check if the input is str or is int & if it's str repeat the loop

[GOTO10]

Check out this link to read about exception handling. In a nutshell, you can use try to attempt code that may cause an exception, and except to execute code only if an exception is encountered.

The example below will exit the while loop if both input variables are successfully converted to integers, but will print the try again message if a ValueError exception occurs.

while True:
    rows_input = input("Enter Rows: " )
    cols_input = input("Enter Cols: " )

    try:
        rows = int(rows_input)
        cols = int(cols_input)
        break

    except ValueError:
        print("you have to Enter a Number not string... [Try again]")