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Metamath Proof Explorer

Theorem 1le2

Description: 1 is less than or equal to 2. (Contributed by David A. Wheeler, 8-Dec-2018)

Ref Expression
Assertion 1le2 1 ≤ 2

Proof

Step Hyp Ref Expression
1 1re ⊢ 1 ∈ ℝ
2 2re ⊢ 2 ∈ ℝ
3 1lt2 ⊢ 1 < 2
4 1 2 3 ltleii ⊢ 1 ≤ 2