It is not obvious but LTSPICE supports triangular or sawtooth periodic waveforms, too.
Of course, one could always resort to a PWL statement, but this gets tedious as the number of cycles increases.
Instead, use a pulsed source (voltage or current) with rise times and fall times set to create the desired triangular or sawtooth waveforms.
• Triangular waveform example:
PULSE(0 1 0 0.5 0.5 0 1) -> triangle from 0 V to 1 V, rise time = 1 s, fall time = 1 s
• Sawtooth waveform:
PULSE(0 1 0 1 0 0 1) -> sawtooth from 0 V to 1 V, rise time = 1 s, fall time = 0 s
Figure 1-1 Triangular and sawtooth waveforms
Source: LTSPICE solutions
SPICE help topics to look at: voltage source, V., current source, I.
Harald Kapp, 2016-06-10