In this video used short and crisp way to find CDF of continuous random variable. It will be very helpful when pdf is given in many intervals. Two examples discussed. Example 1 pdf has different functions given in two intervals . example two based on pdf with different functions in three intervals and also to find unknown value "a". when cdf and unknown both are asked in the continuous r.v. the length of the calculation work can be reduced by following the steps discussed in example 2.