Casio Fx-50fh Ii User Manual -

Contrary to popular belief, SHIFT + CLR + 1 (Setup) only resets display settings—not programs. SHIFT + CLR + 2 (Memory) clears variables but keeps programs. Only SHIFT + CLR + 3 wipes everything. The manual labels this clearly, but many skip it.

Programs must be assigned a specific mode (e.g., COMP, CMPLX) at the start; for example, you cannot use complex number functions in a program set to COMP mode. casio fx-50fh ii user manual

| Mode | Description | |------|-------------| | 1: COMP | Basic arithmetic, functions, memory, constants | | 2: BASE-N | Binary, octal, decimal, hex (max 32-bit) | | 3: EQN | Solve quadratic/cubic equations | | 4: MATRIX | Matrix calculations (up to 3×3) | | 5: VECTOR | Vector operations (2D/3D) | | 6: STAT | Statistical calculations (SD, LR, etc.) | | 7: PROG | Program editing and execution (680 steps total) | Contrary to popular belief, SHIFT + CLR +

This calculator lets you write (max 680 bytes total). The manual (Chapter 8) explains this, but lacks good examples. The manual labels this clearly, but many skip it