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# 2G. Verb Trains

The following phrases illustrate how trains may be substituted for other constructs, often giving expressions that are more readable, particularly to readers more familiar with expressions from mathematics:

`m0=: >: @ +: @ i.` | First odd integers
`m1=: 1: + 2: * i.` | Same as `m0`
`m2=: +/ @ (1: + 2: * i.)` | Sum of odd integers
`m3=: [: +/ 1: + 2: * i.` | Same as `m2` using cap
`m4=: m2 -: *:` | Sum of odds is square (Tautology)
`m5=: < i. 1:` | The first element where`x<y` ;`` also works for`= ~: < <: >: > E.`
`m6=: < i. 0:` | The first element where not`x<y`
`m7=: < i: 1:` | The last element where`x<y`
`m8=: < i: 0:` | The last element where not`x<y`
`m9=: [: +/ <` | The number of elements where`x<y`

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