openflle

openflle (FILENAME,MODE)

Opens a flle in themode specifled in the stringMODE.Broadly equivalent to fopen in standard C. Returns a new flle handle, or, in case of errors, nil plus a string describing the error.Does not modify either _INPUT or _OUTPUT. The MODE string can contain: append update mode (previous data is preserved, append only at the end of flle)

r
read mode
r+
update mode (all previous data preserved)
w
write mode
w+
update mode (all previous data erased)
a
append mode
a+
append update mode (previous data is preserved, append only at the end of flle)
b
binary mode