Generation of "Pulse Width Modulation(PWM)"

Using Arduino Project Guidance
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how do you generate PWM using an arduino ( code) ?

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arun8277:
how do you generate PWM using an arduino ( code) ?

What for?
The PWM needed to dim an LED is generated by analogue write but the PWM needed to control a servo motor is generated by the code in the servo libiary.

Further more, the multiple multiplexed PWM required to emulate a multi channel radio control is something very different.