What is DTF (Discrete Fourier transform)?

The discrete Fourier transform (DFT) changes over a limited arrangement of similarly spaced samples of a function into an equivalent-length sequence of equivalent spaced samples of the discrete-time Fourier transform (DTFT), which is a complex-esteemed function of frequency. It is utilized to perform Fourier analysis in numerous functional applications. The DFT is the most significant discrete transform.