[jerry]$ awk 'BEGIN {
   PI = 3.14159265
   x = -10
   y = 10
   result = atan2 (y,x) * 180 / PI;

   printf "The arc tangent for (x=%f, y=%f) is %f degrees\n", x, y, result
}'

The arc tangent for (x=-10.000000, y=10.000000) is 135.000000 degrees

[jerry]$ awk 'BEGIN {
   PI = 3.14159265
   param = 60
   result = cos(param * PI / 180.0);

   printf "The cosine of %f degrees is %f.\n", param, result
}'

The cosine of 60.000000 degrees is 0.500000.

[jerry]$ awk 'BEGIN {
   param = 5
   result = exp(param);

   printf "The exponential value of %f is %f.\n", param, result
}'

The exponential value of 5.000000 is 148.413159.

[jerry]$ awk 'BEGIN {
   param = 5.12345
   result = int(param)

   print "Truncated value =", result
}'

Truncated value = 5

[jerry]$ awk 'BEGIN {
   param = 5.5
   result = log (param)

   printf "log(%f) = %f\n", param, result
}'

log(5.500000) = 1.704748

[jerry]$ awk 'BEGIN {
   print "Random num1 =" , rand()
   print "Random num2 =" , rand()
   print "Random num3 =" , rand()
}'

Random num1 = 0.237788
Random num2 = 0.291066
Random num3 = 0.845814

[jerry]$ awk 'BEGIN {
   PI = 3.14159265
   param = 30.0
   result = sin(param * PI /180)

   printf "The sine of %f degrees is %f.\n", param, result
}'

The sine of 30.000000 degrees is 0.500000.

[jerry]$ awk 'BEGIN {
   param = 1024.0
   result = sqrt(param)

   printf "sqrt(%f) = %f\n", param, result
}'

sqrt(1024.000000) = 32.000000

[jerry]$ awk 'BEGIN {
   param = 10

   printf "srand() = %d\n", srand()
   printf "srand(%d) = %d\n", param, srand(param)
}'

srand() = 1
srand(10) = 1417959587