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