clear
//
//
//

//Variable declaration    
h=6.6*10^-34;        //planck's constant(J-sec)
m=9.1*10^-31;    //mass of electron(kg)
c=3*10^8;      //velocity of light(m/sec)

//Calculations
lamda=h*10^10/(m*c);        //wavelength of electron(angstrom)

//Result
printf("\n wavelength of electron is %0.4f angstrom",lamda)
printf("\n answer in the book varies due to rounding off errors")