I am working on PCA I have find the of my problem and I have used summary function on it but I am not able to understand it.

```
summary(my.prc)
```

Importance of components:

```
PC1 PC2 PC3 PC4 PC5
Standard deviation 2.1824 1.3454 0.59393 0.27276 1.406e-16
Proportion of Variance 0.6804 0.2586 0.05039 0.01063 0.000e+00
Cumulative Proportion 0.6804 0.9390 0.98937 1.00000 1.000e+00
```

I am not able to understand what Proportion of variance and Cumulative Proportion